Merge remote-tracking branch 'upstream/master'

80 files changed, 4952 insertions, 16 deletions

diff --git a/vorlesungen/slides/2/Makefile.inc b/vorlesungen/slides/2/Makefile.inc
index c857fec..cbd4dfe 100644
--- a/vorlesungen/slides/2/Makefile.inc
+++ b/vorlesungen/slides/2/Makefile.inc
@@ -17,5 +17,19 @@ chapter2 =								\
 	../slides/2/frobeniusanwendung.tex				\
 	../slides/2/quotient.tex					\
 	../slides/2/quotientv.tex					\
+	../slides/2/hilbertraum/definition.tex				\
+	../slides/2/hilbertraum/l2beispiel.tex				\
+	../slides/2/hilbertraum/basis.tex				\
+	../slides/2/hilbertraum/plancherel.tex				\
+	../slides/2/hilbertraum/l2.tex					\
+	../slides/2/hilbertraum/riesz.tex				\
+	../slides/2/hilbertraum/rieszbeispiel.tex			\
+	../slides/2/hilbertraum/adjungiert.tex				\
+	../slides/2/hilbertraum/spektral.tex				\
+	../slides/2/hilbertraum/sturm.tex				\
+	../slides/2/hilbertraum/laplace.tex				\
+	../slides/2/hilbertraum/qm.tex					\
+	../slides/2/hilbertraum/energie.tex				\
+	../slides/2/hilbertraum/sobolev.tex				\
 	../slides/2/chapter.tex
 
diff --git a/vorlesungen/slides/2/chapter.tex b/vorlesungen/slides/2/chapter.tex
index 49e656a..d3714c3 100644
--- a/vorlesungen/slides/2/chapter.tex
+++ b/vorlesungen/slides/2/chapter.tex
@@ -15,3 +15,17 @@
 \folie{2/frobeniusanwendung.tex}
 \folie{2/quotient.tex}
 \folie{2/quotientv.tex}
+\folie{2/hilbertraum/definition.tex}
+\folie{2/hilbertraum/l2beispiel.tex}
+\folie{2/hilbertraum/basis.tex}
+\folie{2/hilbertraum/plancherel.tex}
+\folie{2/hilbertraum/l2.tex}
+\folie{2/hilbertraum/riesz.tex}
+\folie{2/hilbertraum/rieszbeispiel.tex}
+\folie{2/hilbertraum/adjungiert.tex}
+\folie{2/hilbertraum/spektral.tex}
+\folie{2/hilbertraum/sturm.tex}
+\folie{2/hilbertraum/laplace.tex}
+\folie{2/hilbertraum/qm.tex}
+\folie{2/hilbertraum/energie.tex}
+\folie{2/hilbertraum/sobolev.tex}
diff --git a/vorlesungen/slides/2/hilbertraum/adjungiert.tex b/vorlesungen/slides/2/hilbertraum/adjungiert.tex
new file mode 100644
index 0000000..da41576
--- /dev/null
+++ b/vorlesungen/slides/2/hilbertraum/adjungiert.tex
@@ -0,0 +1,83 @@
+%
+% adjungiert.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Adjungierter Operator}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Definition}
+\begin{itemize}
+\item<2->
+$A\colon H\to L$ lineare Abbildung zwischen Hilberträumen, $y\in L$
+\item<3->
+\[
+H\to\mathbb{C}
+:
+x\mapsto \langle y, Ax\rangle_L
+\]
+ist eine lineare Abbildung $H\to\mathbb{C}$
+\item<4->
+Nach dem Darstellungssatz gibt es $v\in H$ mit
+\[
+\langle y,Ax\rangle_L = \langle v,x\rangle_H
+\quad 
+\forall x\in H
+\]
+\end{itemize}
+\uncover<5->{%
+Die Abbildung 
+\[
+L\to H
+:
+y\mapsto v =: A^*y
+\]
+heisst {\em adjungierte Abbildung}}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<6->{%
+\begin{block}{Endlichdimensional (Matrizen)}
+\[
+A^* = \overline{A}^t
+\]
+\end{block}}
+\vspace{-8pt}
+\uncover<7->{%
+\begin{block}{Selbstabbildungen}
+Für Operatoren $A\colon H\to H$ ist $A^*\colon H\to H$
+\[
+\langle x,Ay\rangle
+=
+\langle A^*x, y\rangle
+\quad
+\forall x,y\in H
+\]
+\end{block}}
+\vspace{-8pt}
+\uncover<9->{%
+\begin{block}{Selbstadjungierte Operatoren}
+\[
+A=A^*
+\uncover<10->{\;\Leftrightarrow\;
+\langle x,Ay \rangle
+=
+\langle A^*x,y \rangle}
+\uncover<11->{=
+\langle Ax,y \rangle}
+\]
+\uncover<12->{Matrizen:
+\begin{itemize}
+\item<13-> hermitesch
+\item<14-> für reelle Hilberträume: symmetrisch
+\end{itemize}}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/2/hilbertraum/basis.tex b/vorlesungen/slides/2/hilbertraum/basis.tex
new file mode 100644
index 0000000..022fa07
--- /dev/null
+++ b/vorlesungen/slides/2/hilbertraum/basis.tex
@@ -0,0 +1,65 @@
+%
+% basis.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Hilbert-Basis}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Definition}
+Eine Menge $\mathcal{B}=\{b_k|k>0\}$ ist eine Hilbertbasis, wenn
+\begin{itemize}
+\item<2-> $\mathcal{B}$ ist orthonormiert: $\langle b_k,b_l\rangle=\delta_{kl}$
+\item<3-> Der Unterraum $\langle b_k|k>0\rangle\subset H$ ist
+dicht:
+Jeder Vektor von $H$ kann beliebig genau durch Linearkombinationen von $b_k$
+approximiert werden.
+\end{itemize}
+\uncover<4->{%
+Ein Hilbertraum mit einer Hilbertbasis heisst {\em separabel}}
+\end{block}
+\uncover<5->{%
+\begin{block}{Endlichdimensional}
+Der Algorithmus bricht nach endlich vielen Schritten ab.
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<6->{%
+\begin{block}{Konstruktion}
+Iterativ: $\mathcal{B}_0=\emptyset$
+\begin{enumerate}
+\item<7-> $V_k = \langle \mathcal{B}_k \rangle$
+\item<8-> Wenn $V_k\ne H$, wähle einen Vektor
+\begin{align*}
+x\in V_k^{\perp}
+&=
+\{
+x\in H\;|\; x\perp V_k
+\}
+\\
+&=
+\{x\in H\;|\;
+x\perp y\;\forall y\in V_k
+\}
+\end{align*}
+\item<9-> $b_{k+1} = x/\|x\|$
+\[
+\mathcal{B}_{k+1} = \mathcal{B}_k\cup \{b_{k+1}\}
+\]
+\end{enumerate}
+\uncover<10->{%
+Wenn $H$ separabel ist, dann ist
+\[
+\mathcal{B} = \bigcup_{k} \mathcal{B}_k
+\]
+eine Hilbertbasis für $H$}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/2/hilbertraum/definition.tex b/vorlesungen/slides/2/hilbertraum/definition.tex
new file mode 100644
index 0000000..d101637
--- /dev/null
+++ b/vorlesungen/slides/2/hilbertraum/definition.tex
@@ -0,0 +1,63 @@
+%
+% definition.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Hilbertraum --- Definition}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{$\mathbb{C}$-Hilbertraum $H$}
+\begin{enumerate}
+\item<2-> $\mathbb{C}$-Vektorraum, muss nicht endlichdimensional sein
+\item<3-> Sesquilineares Skalarprodukt
+\[
+\langle \cdot,\cdot\rangle
+\colon H \to \mathbb{C}: (x,y) \mapsto \langle x,y\rangle
+\]
+Dazugehörige Norm:
+\[
+\|x\| = \sqrt{\langle x,x\rangle}
+\]
+\item<4-> Vollständigkeit: jede Cauchy-Folge konvergiert
+\end{enumerate}
+\uncover<5->{%
+Ohne Vollständigkeit: {\em Prähilbertraum}}
+\end{block}
+\uncover<6->{%
+\begin{block}{$\mathbb{R}$-Hilbertraum}
+Vollständiger $\mathbb{R}$-Vektorraum mit bilinearem Skalarprodukt
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<7->{%
+\begin{block}{Vollständigkeit}
+\begin{itemize}
+\item<8-> $(x_n)_{n\in\mathbb{N}}$ ist eine Cauchy-Folge:
+Für alle $\varepsilon>0$ gibt es $N>0$ derart, dass
+\[
+\| x_n-x_m\| < \varepsilon\quad\forall n,m>N
+\]
+\item<9-> Grenzwert existiert: $\exists x\in H$ derart, dass es für alle
+$\varepsilon >0$ ein $N>0$ gibt derart, dass
+\[
+\|x_n-x\|<\varepsilon\quad\forall n>N
+\]
+\end{itemize}
+\end{block}}
+\uncover<10->{%
+\begin{block}{Cauchy-Schwarz-Ungleichung}
+\[
+|\langle x,y\rangle|
+\le  \|x\| \cdot \|y\|
+\]
+Gleichheit für linear abhängige $x$ und $y$
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/2/hilbertraum/energie.tex b/vorlesungen/slides/2/hilbertraum/energie.tex
new file mode 100644
index 0000000..202a7c5
--- /dev/null
+++ b/vorlesungen/slides/2/hilbertraum/energie.tex
@@ -0,0 +1,67 @@
+%
+% energie.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Energie --- Zeitentwicklung --- Schrödinger}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.30\textwidth}
+\uncover<2->{%
+\begin{block}{Totale Energie}
+Hamilton-Funktion
+\begin{align*}
+H
+&=
+\frac12mv^2 + V(x)
+\\
+&=
+\frac{p^2}{2m} + V(x)
+\end{align*}
+\end{block}}
+\uncover<3->{%
+\begin{block}{Quantisierungsregel}
+\begin{align*}
+\text{Variable}&\to \text{Operator}
+\\
+x_k & \to x_k
+\\
+p_k & \to \frac{\hbar}{i} \frac{\partial}{\partial x_k}
+\end{align*}
+\end{block}}
+\end{column}
+\begin{column}{0.66\textwidth}
+\uncover<4->{%
+\begin{block}{Energie-Operator}
+\[
+H
+=
+-\frac{\hbar^2}{2m}\Delta + V(x)
+\]
+\end{block}}
+\uncover<5->{%
+\begin{block}{Eigenwertgleichung}
+\[
+-\frac{\hbar^2}{2m}\Delta\psi(x,t) + V(x)\psi(x,t) = E\psi(x,t)
+\]
+Zeitunabhängige Schrödingergleichung
+\end{block}}
+\uncover<6->{%
+\begin{block}{Zeitabhängigkeit = Schrödingergleichung}
+\[
+-\frac{\hbar}{i}
+\frac{\partial}{\partial t}
+\psi(x,t)
+=
+-\frac{\hbar^2}{2m}\Delta\psi(x,t) + V(x)\psi(x,t)
+\]
+\uncover<7->{Eigenwertgleichung durch Separation von $t$}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/2/hilbertraum/l2.tex b/vorlesungen/slides/2/hilbertraum/l2.tex
new file mode 100644
index 0000000..bd744ab
--- /dev/null
+++ b/vorlesungen/slides/2/hilbertraum/l2.tex
@@ -0,0 +1,61 @@
+%
+% l2.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{$L^2$-Hilbertraum}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Definition}
+\begin{itemize}
+\item<2->
+Vektorraum: Funktionen
+\[
+f\colon [a,b] \to \mathbb{C}
+\]
+\item<3->
+Sesquilineares Skalarprodukt
+\[
+\langle f,g\rangle
+=
+\int_a^b \overline{f(x)}\, g(x) \,dx
+\]
+\item<4->
+Norm:
+\[
+\|f\|^2 = \int_a^b |f(x)|^2\,dx
+\]
+\item<5->
+Vollständigkeit?
+\uncover<6->{$\rightarrow$
+Lebesgue Konvergenz-Satz}
+\end{itemize}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<7->{%
+\begin{block}{Vollständigkeit}
+\begin{itemize}
+\item
+Funktioniert nicht für Riemann-Integral
+\item<8->
+Erweiterung des Integrals auf das sogenannte Lebesgue-Integral (nach
+Henri Lebesgue)
+\item<9->
+Abzählbare Mengen spielen keine Rolle $\rightarrow$ Nullmengen
+\item<10->
+Funktionen $\rightarrow$ Klassen von Funktionen, die sich auf einer Nullmenge
+unterscheiden
+\item<11->
+Konvergenz-Satz von Lebesgue $\rightarrow$ es funktioniert
+\end{itemize}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/2/hilbertraum/l2beispiel.tex b/vorlesungen/slides/2/hilbertraum/l2beispiel.tex
new file mode 100644
index 0000000..3ae44af
--- /dev/null
+++ b/vorlesungen/slides/2/hilbertraum/l2beispiel.tex
@@ -0,0 +1,82 @@
+%
+% l2beispiel.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Beispiele: $\mathbb{R},\mathbb{R}^2,\dots,\mathbb{R}^n,\dots,l^2$}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Definition}
+\begin{itemize}
+\item<2-> Quadratsummierbare Folgen von komplexen Zahlen
+\[
+l^2
+=
+\biggl\{
+(x_k)_{k\in\mathbb{N}}\,\bigg|\, \sum_{k=0}^\infty |x_k|^2 < \infty
+\biggr\}
+\]
+\item<3-> Skalarprodukt:
+\begin{align*}
+\langle x,y\rangle
+&=
+\sum_{k=0}^\infty \overline{x}_ky_k,
+&
+\uncover<4->{\|x\|^2 = \sum_{k=0}^\infty |x_k|^2}
+\end{align*}
+\item<5-> Vollständigkeit,
+Konvergenz: Cauchy-Schwarz-Ungleichung
+\[
+\biggl|
+\sum_{k=0}^\infty \overline{x}_ky_k
+\biggr|
+\le
+\sum_{k=0}^\infty |x_k|^2
+\sum_{l=0}^\infty |y_l|^2
+\]
+\end{itemize}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<6->{%
+\begin{block}{Standardbasisvektoren}
+\begin{align*}
+e_i
+&=
+(0,\dots,0,\underset{\underset{\textstyle i}{\textstyle\uparrow}}{1},0,\dots)
+\\
+\uncover<7->{(e_i)_k &= \delta_{ik}}
+\end{align*}
+\uncover<8->{sind orthonormiert:
+\begin{align*}
+\langle e_i,e_j\rangle
+&=
+\sum_k \overline{\delta}_{ik}\delta_{jk}
+\uncover<9->{=
+\delta_{ij}}
+\end{align*}}
+\end{block}}
+\vspace{-16pt}
+\uncover<10->{%
+\begin{block}{Analyse}
+$x_k$ kann mit Skalarprodukten gefunden werden:
+\begin{align*}
+\hat{x}_i
+=
+\langle e_i,x\rangle
+&\uncover<11->{=
+\sum_{k=0}^\infty \overline{\delta}_{ik}  x_k}
+\uncover<12->{=
+x_i}
+\end{align*}
+\uncover<13->{(Fourier-Koeffizienten)}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/2/hilbertraum/laplace.tex b/vorlesungen/slides/2/hilbertraum/laplace.tex
new file mode 100644
index 0000000..8f6b196
--- /dev/null
+++ b/vorlesungen/slides/2/hilbertraum/laplace.tex
@@ -0,0 +1,66 @@
+%
+% laplace.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Höhere Dimension}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.44\textwidth}
+\begin{block}{Problem}
+Gegeben: $\Omega\subset\mathbb{R}^n$ ein Gebiet
+\\
+Gesucht: Lösungen von $\Delta u=0$ mit $u_{|\partial\Omega}=0$
+\end{block}
+\uncover<2->{%
+\begin{block}{Funktionen}
+Hilbertraum $H$ der Funktionen $f:\overline{\Omega}\to\mathbb{C}$
+mit $f_{|\partial\Omega}=0$
+\end{block}}
+\uncover<3->{%
+\begin{block}{Skalarprodukt}
+\[
+\langle f,g\rangle
+=
+\int_{\Omega} \overline{f}(x) g(x)\,d\mu(x)
+\]
+\end{block}}
+\uncover<4->{%
+\begin{block}{Laplace-Operator}
+\[
+\Delta \psi = \operatorname{div}\operatorname{grad}\psi
+\]
+\end{block}}
+\end{column}
+\begin{column}{0.52\textwidth}
+\uncover<5->{%
+\begin{block}{Selbstadjungiert}
+\begin{align*}
+\langle f,\Delta g\rangle
+&\uncover<6->{=
+\int_{\Omega} \overline{f}(x)\operatorname{div}\operatorname{grad}g(x)\,d\mu(x)}
+\\
+&\uncover<7->{=
+\int_{\partial\Omega}
+\underbrace{\overline{f}(x)}_{\displaystyle=0}\operatorname{grad}g(x)\,d\nu(x)}
+\\
+&\uncover<7->{\qquad
+-
+\int_{\Omega}
+\operatorname{grad}\overline{f}(x)\cdot \operatorname{grad}g(x)
+\,d\mu(x)}
+\\
+&\uncover<8->{=\int_{\Omega}\operatorname{div}\operatorname{grad}\overline{f}(x)g(x)\,d\mu(x)}
+\\
+&\uncover<9->{=
+\langle \Delta f,g\rangle}
+\end{align*}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/2/hilbertraum/plancherel.tex b/vorlesungen/slides/2/hilbertraum/plancherel.tex
new file mode 100644
index 0000000..73dd46b
--- /dev/null
+++ b/vorlesungen/slides/2/hilbertraum/plancherel.tex
@@ -0,0 +1,102 @@
+%
+% plancherel.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Plancherel-Gleichung}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Hilbertraum mit Hilbert-Basis}
+$H$ Hilbertraum mit Hilbert-Basis
+$\mathcal{B}=\{b_k\;|\; k>0\}$, $x\in H$
+\end{block}
+\uncover<2->{%
+\begin{block}{Analyse: Fourier-Koeffizienten}
+\begin{align*}
+a_k = \hat{x}_k &=\langle b_k, x\rangle
+\\
+\uncover<3->{\hat{x}&=\mathcal{F}x}
+\end{align*}
+\end{block}}
+\vspace{-10pt}
+\uncover<4->{%
+\begin{block}{Synthese: Fourier-Reihe}
+\begin{align*}
+\tilde{x}
+&=
+\sum_k a_k b_k
+\uncover<5->{=
+\sum_k \langle x,b_k\rangle b_k}
+\end{align*}
+\end{block}}
+\vspace{-6pt}
+\uncover<6->{%
+\begin{block}{Analyse von $\tilde{x}$}
+\begin{align*}
+\langle b_l,\tilde{x}\rangle
+&=
+\biggl\langle
+b_l,\sum_{k}\langle b_k,x\rangle b_k
+\biggr\rangle
+\uncover<7->{=
+\sum_k \langle b_k,x\rangle\langle b_l,b_k\rangle}
+\uncover<8->{=
+\sum_k \langle b_k,x\rangle\delta_{kl}}
+\uncover<9->{=
+\langle b_l,x\rangle}
+\uncover<10->{=
+\hat{x}_l}
+\end{align*}
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<11->{%
+\begin{block}{Plancherel-Gleichung}
+\begin{align*}
+\|\tilde{x}\|^2
+&=
+\langle \tilde{x},\tilde{x}\rangle
+=
+\biggl\langle
+\sum_k \hat{x}_kb_k,
+\sum_l \hat{x}_lb_l
+\biggr\rangle
+\\
+&\uncover<12->{=
+\sum_{k,l} \overline{\hat{x}}_k\hat{x}_l\langle b_k,b_l\rangle}
+\uncover<13->{=
+\sum_{k,l} \overline{\hat{x}}_k\hat{x}_l\delta_{kl}}
+\\
+\uncover<14->{
+\|\tilde{x}\|^2
+&=
+\sum_k |\hat{x}_k|^2}
+\uncover<15->{=
+\|\hat{x}\|_{l^2}^2}
+\uncover<16->{=
+\|\mathcal{F}x\|_{l^2}^2}
+\end{align*}
+\end{block}}
+\vspace{-12pt}
+\uncover<17->{%
+\begin{block}{Isometrie}
+\begin{align*}
+\mathcal{F}
+\colon
+H \to l^2
+\colon
+x\mapsto \hat{x}
+\end{align*}
+\uncover<18->{Alle separablen Hilberträume sind isometrisch zu $l^2$ via
+%Fourier-Transformation
+$\mathcal{F}$}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/2/hilbertraum/qm.tex b/vorlesungen/slides/2/hilbertraum/qm.tex
new file mode 100644
index 0000000..a108121
--- /dev/null
+++ b/vorlesungen/slides/2/hilbertraum/qm.tex
@@ -0,0 +1,90 @@
+%
+% qm.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Anwendung: Quantenmechanik}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Zustände (Wellenfunktion)}
+$L^2$-Funktionen auf $\mathbb{R}^3$
+\[
+\psi\colon\mathbb{R}^3\to\mathbb{C}
+\]
+\end{block}
+\vspace{-6pt}
+\uncover<2->{%
+\begin{block}{Wahrscheinlichkeitsinterpretation}
+\[
+|\psi(x)|^2 = \left\{
+\begin{minipage}{4.6cm}\raggedright
+Wahrscheinlichkeitsdichte für Position $x$ des Teilchens
+\end{minipage}\right.
+\]
+\end{block}}
+\vspace{-6pt}
+\uncover<3->{%
+\begin{block}{Skalarprodukt}
+\[
+\langle\psi,\psi\rangle
+=
+\int_{\mathbb{R}^3} |\psi(x)|^2\,dx = 1
+\]
+\end{block}}
+\vspace{-6pt}
+\uncover<4->{%
+\begin{block}{Messgrösse $A$}
+Selbstadjungierter Operator $A$
+\\
+\uncover<5->{$\rightarrow$
+Hilbertbasis $|i\rangle$ von EV von $A$}
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<6->{%
+\begin{block}{Überlagerung}
+\begin{align*}
+|\psi\rangle
+&=
+\sum_i
+w_i|i\rangle
+\\
+\uncover<7->{\langle \psi|\psi\rangle
+&=
+\sum_i |w_i|^2 \qquad\text{(Plancherel)}}
+\end{align*}
+\uncover<8->{%
+$|w_i|^2=|\langle \psi|i\rangle|^2$ Wahrscheinlichkeit für Zustand $|i\rangle$
+}
+\end{block}}
+\uncover<9->{%
+\begin{block}{Erwartungswert}
+\begin{align*}
+E(A)
+&\uncover<10->{=
+\sum_i |w_i|^2 \alpha_i}
+\uncover<11->{=
+\sum_i \overline{w}_i\alpha_i w_i }
+\hspace{5cm}
+\\
+&\only<12>{=
+\sum_{i,j} \overline{w}_j\alpha_i w_i \langle j|i\rangle}
+\uncover<13->{=
+\sum_{i} \overline{w}_j\langle j| \sum_i \alpha_i w_i |i\rangle}
+\\
+&\uncover<14->{=
+\sum_{i,j} \overline{w}_j w_i \langle j|
+A|i\rangle}
+\uncover<15->{=
+\langle \psi| A |\psi\rangle}
+\end{align*}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/2/hilbertraum/riesz.tex b/vorlesungen/slides/2/hilbertraum/riesz.tex
new file mode 100644
index 0000000..437fb3c
--- /dev/null
+++ b/vorlesungen/slides/2/hilbertraum/riesz.tex
@@ -0,0 +1,76 @@
+%
+% riesz.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Darstellungssatz von Riesz}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Dualraum}
+$V$ ein Vektorraum, $V^*$ der Raum aller Linearformen
+\[
+f\colon V\to \mathbb{C}
+\]
+\end{block}
+\uncover<3->{%
+\begin{block}{Beispiel: $l^\infty$}
+$l^\infty=\text{beschränkte Folgen in $\mathbb{C}$}$,
+Linearformen:
+\begin{align*}
+\uncover<4->{
+f(x)
+&=
+\sum_{i=0}^\infty f_ix_i}
+\\
+\uncover<5->{
+\|f\|
+&=
+\sup_{\|x\|_{\infty}\le 1}
+|f(x)|}
+\uncover<6->{=
+\sum_{k\in\mathbb{N}} |f_k|}
+\\
+\uncover<7->{
+\Rightarrow
+l^{\infty*}
+&=
+l^1}
+\uncover<9->{\qquad(\ne l^2)}
+\\
+\uncover<8->{
+&=\{\text{summierbare Folgen in $\mathbb{C}$}\}
+}
+\end{align*}
+
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<2->{%
+\begin{block}{Beispiel: $\mathbb{C}^n$}
+${\mathbb{C}^n}^* = \mathbb{C}^n$
+\end{block}}
+\uncover<10->{%
+\begin{theorem}[Riesz]
+Zu einer stetigen Linearform $f\colon H\to\mathbb{C}$ gibt es $v\in H$ mit
+\[
+f(x) = \langle v,x\rangle
+\quad\forall x\in H
+\]
+und $\|f\| = \|v\|$
+\end{theorem}}
+\uncover<11->{%
+\begin{block}{Dualraum von $H$}
+$H^*=H$
+\end{block}}%
+\uncover<12->{%
+Der Hilbertraum ist die ``intuitiv richtige, unendlichdimensionale''
+Verallgemeinerung von $\mathbb{C}^n$}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/2/hilbertraum/rieszbeispiel.tex b/vorlesungen/slides/2/hilbertraum/rieszbeispiel.tex
new file mode 100644
index 0000000..de9383f
--- /dev/null
+++ b/vorlesungen/slides/2/hilbertraum/rieszbeispiel.tex
@@ -0,0 +1,107 @@
+%
+% rieszbeispiel.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Linearform auf $L^2$-Funktionen}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Linearform auf $\mathbb{C}^n$}
+\begin{align*}
+{\color{blue}x}&=\begin{pmatrix}x_1\\x_2\\\vdots\\x_n\end{pmatrix},
+&
+f({\color{blue}x})
+&= 
+\begin{pmatrix}f_1&f_2&\dots&f_n\end{pmatrix} {\color{blue}x}
+\\
+\uncover<2->{
+{\color{red}v}&=
+\rlap{$
+\begin{pmatrix}
+\overline{f}_1&\overline{f}_2&\dots&\overline{f}_n
+\end{pmatrix}^t
+\uncover<3->{\;\Rightarrow\;
+f({\color{blue}x})=\langle {\color{red}v},{\color{blue}x}\rangle}
+$}}
+\end{align*}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<4->{%
+\begin{block}{Linearform auf $L^2([a,b])$}
+\begin{align*}
+{\color{red}x}&\in L^2([a,b])
+\\
+\uncover<5->{
+f&\colon L^2([a,b]) \to \mathbb{C}
+: {\color{red}x} \mapsto f({\color{red}x})}
+\intertext{\uncover<6->{Riesz-Darstellungssatz: $\exists {\color{blue}v}\in L^2([a,b])$}}
+\uncover<7->{f({\color{red}x})
+&=
+\int_a^b {\color{blue}\overline{v}(t)}{\color{red}x(t)}\,dt}
+\end{align*}
+\end{block}}
+\end{column}
+\end{columns}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+\begin{scope}[xshift=-3.5cm]
+\def\s{0.058}
+\foreach \n in {0,...,5}{
+\uncover<3->{
+	\draw[color=red,line width=3pt]
+		({\n+\s},{1/(\n+0.5)}) -- ({\n+\s},0);
+	\node[color=red] at ({\n},{-0.2+1/(\n+0.5)})
+		[above right] {$v_\n\mathstrut$};
+}
+	\draw[color=blue,line width=3pt]
+		({\n-\s},{0.4+0.55*sin(200*\n)+0.25*\n}) -- ({\n-\s},0);
+	\node[color=blue] at ({\n},{-0.2+0.4+0.55*sin(200*\n)+0.25*\n})
+		[above left] {$x_\n\mathstrut$};
+}
+\draw[->] (-0.6,0) -- (6,0) coordinate[label={$n$}];
+\draw[->] (-0.5,-0.1) -- (-0.5,2.5) coordinate[label={right:$x$}];
+\foreach \n in {0,...,5}{
+	\fill (\n,0) circle[radius=0.08];
+	\node at (\n,0) [below] {$\n$\strut};
+}
+\node at (5.6,0) [below] {$\cdots$\strut};
+\end{scope}
+\uncover<4->{
+\begin{scope}[xshift=3.5cm]
+\uncover<7->{
+\fill[color=red!40,opacity=0.5] 
+	plot[domain=0:5,samples=100] (\x,{1/(\x+0.5)})
+	--
+	(5,0) -- (0,0) -- cycle;
+}
+\fill[color=blue!40,opacity=0.5]
+	plot[domain=0:5,samples=100] (\x,{0.4+0.55*sin(200*\x)+0.25*\x})
+	-- (5,0) -- (0,0) -- cycle;
+\uncover<7->{
+\draw[color=red,line width=1.4pt]
+	plot[domain=0:5,samples=100] (\x,{1/(\x+0.5)});
+\node[color=red] at (0,2) [right] {$x(t)$};
+}
+
+\draw[color=blue,line width=1.4pt]
+	plot[domain=0:5,samples=100] (\x,{0.4+0.55*sin(200*\x)+0.25*\x});
+\node[color=blue] at (4.5,2) [right]{$v(t)$};
+
+\draw[->] (-0.6,0) -- (6.0,0) coordinate[label={$t$}];
+\draw[->] (-0.5,-0.1) -- (-0.5,2.5) coordinate[label={right:$x$}];
+\draw (0.0,-0.1) -- (0.0,0.1);
+\node at (0.0,0) [below] {$a$\strut};
+\draw (5.0,-0.1) -- (5.0,0.1);
+\node at (5.0,0) [below] {$b$\strut};
+\end{scope}
+}
+\end{tikzpicture}
+\end{center}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/2/hilbertraum/sobolev.tex b/vorlesungen/slides/2/hilbertraum/sobolev.tex
new file mode 100644
index 0000000..828d34d
--- /dev/null
+++ b/vorlesungen/slides/2/hilbertraum/sobolev.tex
@@ -0,0 +1,51 @@
+%
+% sobolev.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Sobolev-Raum}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Vektorrraum $W$}
+Funktionen $f\colon \Omega\to\mathbb{C}$
+\begin{itemize}
+\item<2->
+$f\in L^2(\Omega)$
+\item<3->
+$\nabla f\in L^2(\Omega)$
+\item<4->
+homogene Randbedingungen:
+$f_{|\partial \Omega}=0$
+\end{itemize}
+\end{block}
+\uncover<5->{%
+\begin{block}{Skalarprodukt}
+\begin{align*}
+\langle f,g\rangle_W
+&\uncover<6->{=
+\int_\Omega \overline{\nabla f}(x)\cdot\nabla g(x)\,d\mu(x)}
+\\
+&\uncover<7->{\qquad + \int_{\Omega} \overline{f}(x)\,g(x)\,d\mu(x)}
+\\
+&\uncover<8->{=\langle f,-\Delta g + g\rangle_{L^2(\Omega)}}
+\end{align*}
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<9->{%
+\begin{block}{Vollständigkeit}
+\dots
+\end{block}}
+\uncover<10->{%
+\begin{block}{Anwendung}
+``Ein Hilbertraum für jedes partielle Differentialgleichungsproblem''
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/2/hilbertraum/spektral.tex b/vorlesungen/slides/2/hilbertraum/spektral.tex
new file mode 100644
index 0000000..b561b69
--- /dev/null
+++ b/vorlesungen/slides/2/hilbertraum/spektral.tex
@@ -0,0 +1,91 @@
+%
+% spektral.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Spektraltheorie für selbstadjungierte Operatoren}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Voraussetzungen}
+\begin{itemize}
+\item
+Hilbertraum $H$
+\item
+$A\colon H\to H$ linear
+\end{itemize}
+\end{block}
+\uncover<2->{%
+\begin{block}{Eigenwerte}
+$x\in H$ ein EV von $A$ zum EW $\lambda\ne 0$
+\begin{align*}
+\uncover<3->{\langle x,x\rangle
+&=
+\frac1{\lambda}
+\langle x,\lambda x\rangle}
+\uncover<3->{=
+\frac1{\lambda}
+\langle x,Ax\rangle}
+\\
+&\uncover<4->{=
+\frac1{\lambda}
+\langle Ax,x\rangle}
+\uncover<5->{=
+\frac{\overline{\lambda}}{\lambda}
+\langle x,x\rangle}
+\\
+\uncover<6->{\frac{\overline{\lambda}}{\lambda}&=1
+\quad\Rightarrow\quad
+\overline{\lambda} = \lambda}
+\uncover<7->{\quad\Rightarrow\quad
+\lambda\in\mathbb{R}}
+\end{align*}
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<8->{%
+\begin{block}{Orthogonalität}
+$u,v$ EV zu EW $\mu,\lambda\in \mathbb{R}\setminus\{0\}$, $\overline{\mu}=\mu\ne\lambda$
+\begin{align*}
+\uncover<9->{
+\langle u,v\rangle
+&=
+\frac{1}{\mu}
+\langle \mu u,v\rangle}
+\uncover<10->{=
+\frac{1}{\mu}
+\langle Au,v\rangle}
+\\
+&\uncover<11->{=
+\frac{1}{\mu}
+\langle u,Av\rangle}
+\uncover<12->{=
+\frac{1}{\mu}
+\langle u,\lambda v\rangle}
+\uncover<13->{=
+\frac{\lambda}{\mu}
+\langle u,v\rangle}
+\\
+\uncover<14->{\Rightarrow
+\;
+0
+&=
+\underbrace{\biggl(\frac{\lambda}{\mu}-1\biggr)}_{\displaystyle \ne 0}
+\langle u,v\rangle}
+\uncover<15->{\;\Rightarrow\;
+\langle u,v\rangle = 0}
+\end{align*}
+\uncover<16->{EV zu verschiedenen EW sind orthogonal}
+\end{block}}
+\end{column}
+\end{columns}
+\uncover<17->{%
+\begin{block}{Spektralsatz}
+Es gibt eine Hilbertbasis von $H$ aus Eigenvektoren von $A$
+\end{block}}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/2/hilbertraum/sturm.tex b/vorlesungen/slides/2/hilbertraum/sturm.tex
new file mode 100644
index 0000000..a6865ab
--- /dev/null
+++ b/vorlesungen/slides/2/hilbertraum/sturm.tex
@@ -0,0 +1,58 @@
+%
+% sturm.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Sturm-Liouville-Problem}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Wellengleichung}
+Saite mit variabler Massedichte führt auf die DGL
+\[
+-y''(t) + q(t) y(t) = \lambda y(t),
+\quad
+q(t) > 0
+\]
+mit Randbedingungen $y(0)=y(1)=0$
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<2->{%
+\begin{block}{Sturm-Liouville-Operator}
+\[
+A=-\frac{d^2}{dt^2} + q(t) = -D^2 + p
+\]
+auf differenzierbaren Funktionen $\Omega=[0,1]\to\mathbb{C}$ mit Randwerten
+\[
+f(0)=f(1)=0
+\]
+\end{block}}
+\end{column}
+\end{columns}
+\uncover<3->{%
+\begin{block}{Selbstadjungiert}
+\begin{align*}
+\langle f,Ag \rangle
+&\uncover<4->{=
+\langle f,-D^2 g\rangle + \langle f,qg\rangle
+=
+-
+\int_0^1 \overline{f}(t) \frac{d^2}{dt^2}g(t)\,dt
++\langle f,qg\rangle}
+\\
+&\uncover<5->{=-\underbrace{[\overline{f}(t)g'(t)]_0^1}_{\displaystyle=0}
++\int_0^1 \overline{f}'(t)g'(t)\,dt
++\langle f,qg\rangle}
+\uncover<6->{=-\int_0^1 \overline{f}''(t)g(t)\,dt
++\langle qf,g\rangle}
+\\
+&\uncover<7->{=\langle Af,g\rangle}
+\end{align*}
+\end{block}}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/Makefile.inc b/vorlesungen/slides/7/Makefile.inc
index 7512612..ffd5091 100644
--- a/vorlesungen/slides/7/Makefile.inc
+++ b/vorlesungen/slides/7/Makefile.inc
@@ -16,13 +16,20 @@ chapter5 =								\
 	../slides/7/einparameter.tex					\
 	../slides/7/ableitung.tex					\
 	../slides/7/liealgebra.tex					\
+	../slides/7/liealgbeispiel.tex					\
+	../slides/7/vektorlie.tex					\
 	../slides/7/kommutator.tex					\
+	../slides/7/bch.tex						\
 	../slides/7/dg.tex						\
+	../slides/7/interpolation.tex					\
+	../slides/7/exponentialreihe.tex				\
+	../slides/7/logarithmus.tex					\
 	../slides/7/zusammenhang.tex					\
 	../slides/7/quaternionen.tex					\
 	../slides/7/qdreh.tex						\
 	../slides/7/ueberlagerung.tex					\
 	../slides/7/hopf.tex						\
 	../slides/7/haar.tex						\
+	../slides/7/integration.tex					\
 	../slides/7/chapter.tex
 
diff --git a/vorlesungen/slides/7/bch.tex b/vorlesungen/slides/7/bch.tex
new file mode 100644
index 0000000..0148dc4
--- /dev/null
+++ b/vorlesungen/slides/7/bch.tex
@@ -0,0 +1,76 @@
+%
+% bch.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Baker-Campbell-Hausdorff-Formel}
+$g(t),h(t)\in G
+\uncover<2->{\Rightarrow \exists A,B\in LG\text{ mit }
+g(t)=\exp At, h(t)=\exp Bt}$
+\uncover<3->{%
+\begin{align*}
+g(t)
+&=
+I + At + \frac{A^2t^2}{2!} + \frac{A^3t^3}{3!} + \dots,
+&
+h(t)
+&=
+I + Bt + \frac{B^2t^2}{2!} + \frac{B^3t^3}{3!} + \dots
+\end{align*}}
+\uncover<5->{%
+\begin{block}{Kommutator in G: $c(t) = g(t)h(t)g(t)^{-1}h(t)^{-1}$}
+\begin{align*}
+\uncover<6->{c(t)
+&=
+\biggl(
+  {\color<7,9-11,13-15,19-21>{red}I}
+  + {\color<8,16-19>{red}A}t
+  + \frac{{\color<12>{red}A^2}t^2}{2!}
+  + \dots
+\biggr)
+\biggl(
+  {\color<7,8,10-12,14-15,17-18,21>{red}I}
+  + {\color<9,16,19-20>{red}B}t
+  + \frac{{\color<13>{red}B^2}t^2}{2!}
+  + \dots
+\biggr)
+\exp(-{\color<10,14,17,19,21>{red}A}t)
+\exp(-{\color<11,15,18,20-21>{red}B}t)
+}
+\\
+&\uncover<7->{={\color<7>{red}I}}
+\uncover<8->{+t(
+   \uncover<8->{  {\color<8>{red}A}}
+   \uncover<9->{+ {\color<9>{red}B}}
+   \uncover<10->{- {\color<10>{red}A}}
+   \uncover<11->{- {\color<11>{red}B}}
+)}
+\uncover<12->{+\frac{t^2}{2!}(
+  \uncover<12->{  {\color<12>{red}A^2}}
+  \uncover<13->{+ {\color<13>{red}B^2}}
+  \uncover<14->{+ {\color<14>{red}A^2}}
+  \uncover<15->{+ {\color<15>{red}B^2}}
+)}
+\\
+&\phantom{\mathstrut=I}
+\uncover<12->{+t^2(
+     \uncover<16->{  {\color<16>{red}AB}}
+     \uncover<17->{- {\color<17>{red}A^2}}
+     \uncover<18->{- {\color<18>{red}AB}}
+     \uncover<19->{- {\color<19>{red}BA}}
+     \uncover<20->{- {\color<20>{red}B^2}}
+     \uncover<21->{+ {\color<21>{red}AB}}
+)}
+\uncover<22->{+t^3(\dots)+\dots}
+\\
+&\uncover<23->{=
+I + \frac{t^2}{2}[A,B] + o(t^3)
+}
+\end{align*}}
+\end{block}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/chapter.tex b/vorlesungen/slides/7/chapter.tex
index 1c78ccc..3736e0f 100644
--- a/vorlesungen/slides/7/chapter.tex
+++ b/vorlesungen/slides/7/chapter.tex
@@ -15,11 +15,18 @@
 \folie{7/einparameter.tex}
 \folie{7/ableitung.tex}
 \folie{7/liealgebra.tex}
+\folie{7/liealgbeispiel.tex}
+\folie{7/vektorlie.tex}
 \folie{7/kommutator.tex}
+\folie{7/bch.tex}
 \folie{7/dg.tex}
+\folie{7/interpolation.tex}
+\folie{7/exponentialreihe.tex}
+\folie{7/logarithmus.tex}
 \folie{7/zusammenhang.tex}
 \folie{7/quaternionen.tex}
 \folie{7/qdreh.tex}
 \folie{7/ueberlagerung.tex}
 \folie{7/hopf.tex}
 \folie{7/haar.tex}
+\folie{7/integration.tex}
diff --git a/vorlesungen/slides/7/dg.tex b/vorlesungen/slides/7/dg.tex
index 4447bac..f9528a4 100644
--- a/vorlesungen/slides/7/dg.tex
+++ b/vorlesungen/slides/7/dg.tex
@@ -45,7 +45,7 @@ Ableitung von $\gamma(t)$ an der Stelle $t$:
 \vspace{-10pt}
 \uncover<7->{%
 \begin{block}{Differentialgleichung}
-\vspace{-10pt}
+%\vspace{-10pt}
 \[
 \dot{\gamma}(t) = \gamma(t) A
 \quad
@@ -66,7 +66,7 @@ Exponentialfunktion
 \vspace{-5pt}
 \uncover<9->{%
 \begin{block}{Kontrolle: Tangentialvektor berechnen}
-\vspace{-10pt}
+%\vspace{-10pt}
 \begin{align*}
 \frac{d}{dt}e^{At}
 &\uncover<10->{=
diff --git a/vorlesungen/slides/7/einparameter.tex b/vorlesungen/slides/7/einparameter.tex
index 5171085..a32affd 100644
--- a/vorlesungen/slides/7/einparameter.tex
+++ b/vorlesungen/slides/7/einparameter.tex
@@ -41,7 +41,7 @@ D_{x,t+s}
 \begin{column}{0.48\textwidth}
 \uncover<5->{%
 \begin{block}{Scherungen in $\operatorname{SL}_2(\mathbb{R})$}
-\vspace{-12pt}
+%\vspace{-12pt}
 \[
 \begin{pmatrix}
 1&s\\
@@ -61,7 +61,7 @@ D_{x,t+s}
 \vspace{-12pt}
 \uncover<6->{%
 \begin{block}{Skalierungen in $\operatorname{SL}_2(\mathbb{R})$}
-\vspace{-12pt}
+%\vspace{-12pt}
 \[
 \begin{pmatrix}
 e^s&0\\0&e^{-s}
@@ -78,7 +78,7 @@ e^{t+s}&0\\0&e^{-(t+s)}
 \vspace{-12pt}
 \uncover<7->{%
 \begin{block}{Gemischt}
-\vspace{-12pt}
+%\vspace{-12pt}
 \begin{gather*}
 A_t = I \cosh t + \begin{pmatrix}1&a\\0&-1\end{pmatrix}\sinh t
 \\
diff --git a/vorlesungen/slides/7/exponentialreihe.tex b/vorlesungen/slides/7/exponentialreihe.tex
new file mode 100644
index 0000000..b1aeda6
--- /dev/null
+++ b/vorlesungen/slides/7/exponentialreihe.tex
@@ -0,0 +1,24 @@
+%
+% exponentialreihe.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Exponentialreihe}
+\begin{align*}
+h(s) &= \exp(tA_0 + sB) = \sum_{k=0}^\infty \frac{1}{k!} (tA_0 + sB)^k
+\\
+&=
+I + (tA_0 + sB) + \frac{1}{2!}(t^2A_0^2 + ts(A_0B + BA_0) + s^2B^2)
++ \frac{1}{3!}(t^3A_0^3 + t^2s(A_0^2B + A_0BA_0 + BA_0^2) + \dots)
++ \dots
+\\
+\frac{dg(s)}{ds}
+&=
+B + \frac1{2!}t(A_0B+BA_0) + \frac{1}{3!}t^2(A_0^2B+A_0BA_0+BA_0^2) + \dots
+\end{align*}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/images/Makefile b/vorlesungen/slides/7/images/Makefile
index cc67c8a..6f99bc3 100644
--- a/vorlesungen/slides/7/images/Makefile
+++ b/vorlesungen/slides/7/images/Makefile
@@ -3,7 +3,7 @@
 #
 # (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
 # 
-all:	rodriguez.jpg 
+all:	rodriguez.jpg  test.png
 
 rodriguez.png:	rodriguez.pov
 	povray +A0.1 -W1920 -H1080 -Orodriguez.png rodriguez.pov
@@ -16,4 +16,14 @@ commutator:	commutator.ini commutator.pov common.inc
 jpg:
 	for f in c/c*.png; do convert $${f} c/`basename $${f} .png`.jpg; done
 
+dreibein/timestamp:	interpolation.m
+	octave interpolation.m
+	touch dreibein/timestamp
 
+test.png:	test.pov drehung.inc dreibein/d025.inc dreibein/timestamp
+	povray +A0.1 -W1080 -H1080 -Otest.png test.pov
+
+dreibein/d025.inc:	dreibein/timestamp
+
+animation:
+	povray +A0.1 -W1080 -H1080 -Ointerpolation/i.png interpolation.ini
diff --git a/vorlesungen/slides/7/images/drehung.inc b/vorlesungen/slides/7/images/drehung.inc
new file mode 100644
index 0000000..c9b4bb7
--- /dev/null
+++ b/vorlesungen/slides/7/images/drehung.inc
@@ -0,0 +1,142 @@
+//
+// common.inc
+//
+// (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+//
+#version 3.7;
+#include "colors.inc"
+
+global_settings {
+	assumed_gamma 1
+}
+
+#declare imagescale = 0.23;
+#declare O = <0, 0, 0>;
+#declare at = 0.02;
+
+camera {
+	location <8.5, 2, 6.5>
+	look_at <0, 0, 0>
+	right x * imagescale
+	up y * imagescale
+}
+
+//light_source {
+//	<-14, 20, -50> color White
+//	area_light <1,0,0> <0,0,1>, 10, 10
+//	adaptive 1
+//	jitter
+//}
+
+light_source {
+	<41, 20, 10> color White
+	area_light <1,0,0> <0,0,1>, 10, 10
+	adaptive 1
+	jitter
+}
+
+sky_sphere {
+	pigment {
+		color rgb<1,1,1>
+	}
+}
+
+#macro arrow(from, to, arrowthickness, c)
+#declare arrowdirection = vnormalize(to - from);
+#declare arrowlength = vlength(to - from);
+union { 
+	sphere {
+		from, 1.0 * arrowthickness
+	}
+	cylinder {
+		from,
+		from + (arrowlength - 5 * arrowthickness) * arrowdirection,
+		arrowthickness
+	}
+	cone {  
+		from + (arrowlength - 5 * arrowthickness) * arrowdirection,
+		2 * arrowthickness,
+		to,
+		0
+	}
+	pigment {
+		color c
+	}
+	finish {
+		specular 0.9
+		metallic
+	}
+}
+#end
+#declare r = 1.0;
+
+arrow(< -r-0.2,    0.0,    0  >, <  r+0.2,    0.0,    0.0 >, at, Gray)
+arrow(<    0.0,    0.0, -r-0.2>, <    0.0,    0.0,  r+0.2 >, at, Gray)
+arrow(<    0.0, -r-0.2,    0  >, <    0.0,  r+0.2,    0.0 >, at, Gray)
+
+#declare farbeX = rgb<1.0,0.2,0.6>;
+#declare farbeY = rgb<0.0,0.8,0.4>;
+#declare farbeZ = rgb<0.4,0.6,1.0>;
+
+#declare farbex = rgb<1.0,0.0,0.0>;
+#declare farbey = rgb<0.0,0.6,0.0>;
+#declare farbez = rgb<0.0,0.0,1.0>;
+
+#macro quadrant(X, Y, Z)
+	intersection {
+		sphere { O, 0.5 }
+		plane { -X, 0 }
+		plane { -Y, 0 }
+		plane { -Z, 0 }
+		pigment {
+			color rgb<1.0,0.6,0.2>
+		}
+		finish {
+			specular 0.95
+			metallic
+		}
+	}
+	arrow(O, X, 1.1*at, farbex)
+	arrow(O, Y, 1.1*at, farbey)
+	arrow(O, Z, 1.1*at, farbez)
+#end
+
+#macro drehung(X, Y, Z)
+//	intersection {
+//		sphere { O, 0.5 }
+//		plane { -X, 0 }
+//		plane { -Y, 0 }
+//		plane { -Z, 0 }
+//		pigment {
+//			color Gray
+//		}
+//		finish {
+//			specular 0.95
+//			metallic
+//		}
+//	}
+	arrow(O, 1.1*X, 0.9*at, farbeX)
+	arrow(O, 1.1*Y, 0.9*at, farbeY)
+	arrow(O, 1.1*Z, 0.9*at, farbeZ)
+#end
+
+#macro achse(H)
+	cylinder { H, -H, at
+		pigment {
+			color rgb<0.6,0.4,0.2>
+		}
+		finish {
+			specular 0.95
+			metallic
+		}
+	}
+	cylinder { 0.003 * H, -0.003 * H, 1
+		pigment {
+			color rgbt<0.6,0.4,0.2,0.5>
+		}
+		finish {
+			specular 0.95
+			metallic
+		}
+	}
+#end
diff --git a/vorlesungen/slides/7/images/interpolation.ini b/vorlesungen/slides/7/images/interpolation.ini
new file mode 100644
index 0000000..f07c079
--- /dev/null
+++ b/vorlesungen/slides/7/images/interpolation.ini
@@ -0,0 +1,8 @@
+Input_File_Name=interpolation.pov
+Initial_Frame=0
+Final_Frame=50
+Initial_Clock=0
+Final_Clock=50
+Cyclic_Animation=off
+Pause_when_Done=off
+
diff --git a/vorlesungen/slides/7/images/interpolation.m b/vorlesungen/slides/7/images/interpolation.m
new file mode 100644
index 0000000..31554e8
--- /dev/null
+++ b/vorlesungen/slides/7/images/interpolation.m
@@ -0,0 +1,54 @@
+#
+# interpolation.m
+#
+# (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+#
+global N;
+N = 50;
+global A;
+global B;
+
+A = (pi / 2) * [
+  0, 0,  0;
+  0, 0, -1;
+  0, 1,  0
+];
+g0 = expm(A)
+
+B = (pi / 2) * [
+  0, 0, 1;
+  0, 0, 0;
+ -1, 0, 0
+];
+g1 = expm(B)
+
+function retval = g(t)
+	global A;
+	global B;
+	retval = expm((1-t)*A+t*B);
+endfunction
+
+function dreibein(fn, M, funktion)
+	fprintf(fn, "%s(<%.4f,%.4f,%.4f>, <%.4f,%.4f,%.4f>, <%.4f,%.4f,%.4f>)\n",
+		funktion,
+		M(1,1), M(3,1), M(2,1),
+		M(1,2), M(3,2), M(2,2),
+		M(1,3), M(3,3), M(2,3));
+endfunction
+
+G = g1 * inverse(g0);
+[V, lambda] = eig(G);
+H = real(V(:,3));
+
+D = logm(g1*inverse(g0));
+
+for i = (0:N)
+	filename = sprintf("dreibein/d%03d.inc", i);
+	fn = fopen(filename, "w");
+	t = i/N;
+	dreibein(fn, g(t), "quadrant");
+	dreibein(fn, expm(t*D)*g0, "drehung");
+	fprintf(fn, "achse(<%.4f,%.4f,%.4f>)\n", H(1,1), H(3,1), H(2,1));
+	fclose(fn);
+endfor
+
diff --git a/vorlesungen/slides/7/images/interpolation.pov b/vorlesungen/slides/7/images/interpolation.pov
new file mode 100644
index 0000000..71e0257
--- /dev/null
+++ b/vorlesungen/slides/7/images/interpolation.pov
@@ -0,0 +1,10 @@
+//
+// commutator.pov
+//
+// (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+//
+#include "drehung.inc"
+
+#declare filename = concat("dreibein/d", str(clock, -3, 0), ".inc");
+#include filename
+
diff --git a/vorlesungen/slides/7/images/test.pov b/vorlesungen/slides/7/images/test.pov
new file mode 100644
index 0000000..5707be1
--- /dev/null
+++ b/vorlesungen/slides/7/images/test.pov
@@ -0,0 +1,7 @@
+//
+// test.pov
+//
+// (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+//
+#include "drehung.inc"
+#include "dreibein/d025.inc"
diff --git a/vorlesungen/slides/7/integration.tex b/vorlesungen/slides/7/integration.tex
new file mode 100644
index 0000000..525e6de
--- /dev/null
+++ b/vorlesungen/slides/7/integration.tex
@@ -0,0 +1,66 @@
+%
+% integration.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Invariante Integration}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Koordinatenwechsel}
+Die Koordinatentransformation
+$f\colon\mathbb{R}^n\to\mathbb{R}^n:x\to y$
+hat die Ableitungsmatrix
+\[
+t_{ij}
+=
+\frac{\partial y_i}{\partial x_j}
+\]
+\uncover<2->{%
+$n$-faches Integral
+\begin{gather*}
+\int\dots\int
+h(f(x))
+\det
+\biggl(
+\frac{\partial y_i}{\partial x_j}
+\biggr)
+\,dx_1\,\dots dx_n
+\\
+=
+\int\dots\int
+h(y)
+\,dy_1\,\dots dy_n
+\end{gather*}}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<3->{%
+\begin{block}{auf einer Lie-Gruppe}
+Koordinatenwechsel sind Multiplikationen mit einer
+Matrix $g\in G$
+\end{block}}
+\uncover<4->{%
+\begin{block}{Volumenelement in $I$}
+Man muss nur das Volumenelement in $I$ in einem beliebigen
+Koordinatensystem definieren:
+\[
+dV = dy_1\,\dots\,dy_n
+\]
+\end{block}}
+\uncover<5->{%
+\begin{block}{Volumenelement in $g$}
+\[
+\text{``\strut}g\cdot dV\text{\strut''}
+=
+\det(g) \, dy_1\,\dots\,dy_n
+\]
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/interpolation.tex b/vorlesungen/slides/7/interpolation.tex
new file mode 100644
index 0000000..249ee26
--- /dev/null
+++ b/vorlesungen/slides/7/interpolation.tex
@@ -0,0 +1,112 @@
+%
+% interpolation.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\def\bild#1#2{\only<#1|handout:0>{\includegraphics[width=\textwidth]{../slides/7/images/interpolation/#2.png}}}
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Interpolation}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Aufgabe}
+Finde einen Weg $g(t)\in \operatorname{SO}(3)$ zwischen
+$g_0\in\operatorname{SO}(3)$
+und
+$g_1\in\operatorname{SO}(3)$:
+\[
+g_0=g(0)
+\quad\wedge\quad
+g_1=g(1)
+\]
+\end{block}
+\vspace{-10pt}
+\uncover<2->{%
+\begin{block}{Lösung}
+$g_i=\exp(A_i) \uncover<3->{\Rightarrow A_i^t=-A_i}$
+\begin{align*}
+\uncover<4->{A(t) &= (1-t)A_0 + tA_1}\uncover<8->{ \in \operatorname{so}(3)}
+\\
+\uncover<5->{A(t)^t
+&=(1-t)A_0^t + tA_1^t}
+\\
+&\uncover<6->{=
+-(1-t)A_0 - t A_1}
+\uncover<7->{=
+-A(t)}
+\\
+\uncover<9->{\Rightarrow
+g(t) &= \exp A(t) \in \operatorname{SO}(3)}
+\\
+&\uncover<10->{\ne 
+\exp (\log(g_1g_0^{-1})t) g_0}
+\end{align*}
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<11->{%
+\begin{block}{Animation}
+\centering
+\ifthenelse{\boolean{presentation}}{
+\bild{12}{i00}
+\bild{13}{i01}
+\bild{14}{i02}
+\bild{15}{i03}
+\bild{16}{i04}
+\bild{17}{i05}
+\bild{18}{i06}
+\bild{19}{i07}
+\bild{20}{i08}
+\bild{21}{i09}
+\bild{22}{i10}
+\bild{23}{i11}
+\bild{24}{i12}
+\bild{25}{i13}
+\bild{26}{i14}
+\bild{27}{i15}
+\bild{28}{i16}
+\bild{29}{i17}
+\bild{30}{i18}
+\bild{31}{i19}
+\bild{32}{i20}
+\bild{33}{i21}
+\bild{34}{i22}
+\bild{35}{i23}
+\bild{36}{i24}
+\bild{37}{i25}
+\bild{38}{i26}
+\bild{39}{i27}
+\bild{40}{i28}
+\bild{41}{i29}
+\bild{42}{i30}
+\bild{43}{i31}
+\bild{44}{i32}
+\bild{45}{i33}
+\bild{46}{i34}
+\bild{47}{i35}
+\bild{48}{i36}
+\bild{49}{i37}
+\bild{50}{i38}
+\bild{51}{i39}
+\bild{52}{i40}
+\bild{53}{i41}
+\bild{54}{i42}
+\bild{55}{i43}
+\bild{56}{i44}
+\bild{57}{i45}
+\bild{58}{i46}
+\bild{59}{i47}
+\bild{60}{i48}
+\bild{61}{i49}
+\bild{62}{i50}
+}{
+\includegraphics[width=\textwidth]{../slides/7/images/interpolation/i25.png}
+}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/liealgbeispiel.tex b/vorlesungen/slides/7/liealgbeispiel.tex
new file mode 100644
index 0000000..a17de40
--- /dev/null
+++ b/vorlesungen/slides/7/liealgbeispiel.tex
@@ -0,0 +1,78 @@
+%
+% liealgbeispiel.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Lie-Algebra Beispiele}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{$\operatorname{sl}_2(\mathbb{R})$}
+Spurlose Matrizen:
+\[
+\operatorname{sl}_2(\mathbb{R})
+=
+\{A\in M_n(\mathbb{R})\;|\; \operatorname{Spur}A=0\}
+\]
+\end{block}
+\begin{block}{Lie-Algebra?}
+Nachrechnen: $[A,B]\in \operatorname{sl}_2(\mathbb{R})$:
+\begin{align*}
+\operatorname{Spur}([A,B])
+&=
+\operatorname{Spur}(AB-BA)
+\\
+&=
+\operatorname{Spur}(AB)-\operatorname{Spur}(BA)
+\\
+&=
+\operatorname{Spur}(AB)-\operatorname{Spur}(AB)
+\\
+&=0
+\end{align*}
+$\Rightarrow$ $\operatorname{sl}_2(\mathbb{R})$ ist eine Lie-Algebra
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\begin{block}{$\operatorname{so}(n)$}
+Antisymmetrische Matrizen:
+\[
+\operatorname{so}(n)
+=
+\{A\in M_n(\mathbb{R})
+\;|\;
+A=-A^t
+\}
+\]
+\end{block}
+\begin{block}{Lie-Algebra?}
+Nachrechnen: $A,B\in \operatorname{so}(n)$
+\begin{align*}
+[A,B]^t
+&=
+(AB-BA)^t
+\\
+&=
+B^tA^t - A^tB^t
+\\
+&=
+(-B)(-A)-(-A)(-B)
+\\
+&=
+BA-AB
+=
+-(AB-BA)
+\\
+&=
+-[A,B]
+\end{align*}
+$\Rightarrow$ $\operatorname{so}(n)$ ist eine Lie-Algebra
+\end{block}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/logarithmus.tex b/vorlesungen/slides/7/logarithmus.tex
new file mode 100644
index 0000000..58065d7
--- /dev/null
+++ b/vorlesungen/slides/7/logarithmus.tex
@@ -0,0 +1,82 @@
+%
+% logarithmus.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Logarithmus}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Taylor-Reihe}
+\begin{align*}
+\frac{d}{dx}\log(1+x)
+&= \frac{1}{1+x}
+\\
+\uncover<2->{
+\Rightarrow\quad
+\log (1+x)
+&=
+\int_0^x \frac{1}{1+t}\,dt}
+\end{align*}
+\begin{align*}
+\uncover<3->{\frac{1}{1+t}
+&=
+1-t+t^2-t^3+\dots}
+\\
+\uncover<4->{\log(1+x)
+&=\int_0^x
+1-t+t^2-t^3+\dots
+\,dt}
+\\
+&\only<5>{=
+x-\frac{x^2}{2}  + \frac{x^3}{3} - \frac{x^4}4 + \dots}
+\uncover<6->{=
+\sum_{k=1}^\infty (-1)^{k-1}\frac{x^k}{k}}
+\\
+\uncover<7->{\log (I+A)
+&=
+\sum_{k=1}^\infty \frac{(-1)^{k-1}}{k}A^k}
+\end{align*}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<8->{%
+\begin{block}{Konvergenzradius}
+Polstelle bei $x=-1$
+\(
+\varrho =1
+\)
+\end{block}}
+\vspace{-5pt}
+\begin{block}{\uncover<9->{Alternative: Spektraltheorie}}
+\uncover<9->{
+Logarithmus $\log z$ in $\{z\in\mathbb{C}\;|\; \neg(\Re z\le 0\wedge\Im z=0)\}$
+definiert:}
+\vspace{-15pt}
+\uncover<8->{
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+\uncover<9->{
+	\fill[color=red!20] (-2.1,-2.1) rectangle (2.5,2.1);
+}
+\draw[->] (-2.2,0) -- (2.9,0) coordinate[label={$\Re z$}];
+\draw[->] (0,-2.2) -- (0,2.4) coordinate[label={right:$\Im z$}];
+\fill[color=blue!40,opacity=0.5] (1,0) circle[radius=1];
+\draw[color=blue] (1,0) circle[radius=1];
+\uncover<9->{
+	\draw[color=white,line width=5pt] (-2.2,0) -- (0.1,0);
+}
+\fill (1,0) circle[radius=0.08];
+\node at (2.3,1.9) {$\mathbb{C}$};
+\node at (1,0) [below] {$1$};
+\end{tikzpicture}
+\end{center}}
+\end{block}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/vektorlie.tex b/vorlesungen/slides/7/vektorlie.tex
new file mode 100644
index 0000000..621a832
--- /dev/null
+++ b/vorlesungen/slides/7/vektorlie.tex
@@ -0,0 +1,206 @@
+%
+% viktorlie.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\definecolor{darkgreen}{rgb}{0,0.6,0}
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Vektorprodukt als Lie-Algebra}
+%\vspace{-10pt}
+\centering
+\begin{tikzpicture}[>=latex,thick]
+\arraycolsep=2.4pt
+\def\Ax{0}
+\def\Ux{4.1}
+\def\Kx{7.2}
+\def\Rx{13.1}
+
+\def\Lx{2.2}
+\def\Ly{0}
+\def\Lz{-2.2}
+
+\fill[color=red!20] (\Ax,{\Lx-1.55}) rectangle ({\Ux-0.1},{\Lx+0.55});
+\fill[color=red!20] (\Ux,{\Lx-1.55}) rectangle ({\Kx-0.1},{\Lx+0.55});
+\fill[color=red!20] (\Kx,{\Lx-1.55}) rectangle ({\Rx},{\Lx+0.55});
+
+\fill[color=darkgreen!20] (\Ax,{\Ly-1.55}) rectangle ({\Ux-0.1},{\Ly+0.55});
+\fill[color=darkgreen!20] (\Ux,{\Ly-1.55}) rectangle ({\Kx-0.1},{\Ly+0.55});
+\fill[color=darkgreen!20] (\Kx,{\Ly-1.55}) rectangle ({\Rx},{\Ly+0.55});
+
+\fill[color=blue!20] (\Ax,{\Lz-1.55}) rectangle ({\Ux-0.1},{\Lz+0.55});
+\fill[color=blue!20] (\Ux,{\Lz-1.55}) rectangle ({\Kx-0.1},{\Lz+0.55});
+\fill[color=blue!20] (\Kx,{\Lz-1.55}) rectangle ({\Rx},{\Lz+0.55});
+
+\coordinate (A) at (\Ax,3.2);
+\coordinate (Ax) at (\Ax,\Lx);
+\coordinate (Ay) at (\Ax,\Ly);
+\coordinate (Az) at (\Ax,\Lz);
+
+\node at (A) [right]
+	{\usebeamercolor[fg]{title}Drehmatrix, $\operatorname{SO}(n)$\strut};
+
+\node at (Ax) [right] {$\displaystyle\tiny
+D_{x,\alpha}=\begin{pmatrix}
+1&0&0\\
+0&\cos\alpha&-\sin\alpha\\
+0&\sin\alpha&\cos\alpha
+\end{pmatrix}$};
+
+\node at (Ay) [right] {$\displaystyle\tiny
+D_{y,\alpha}=\begin{pmatrix}
+\cos\alpha&0&\sin\alpha\\
+0&1&0\\
+-\sin\alpha&0&\cos\alpha
+\end{pmatrix}$};
+
+\node at (Az) [right] {$\displaystyle\tiny
+D_{z,\alpha}=\begin{pmatrix}
+\cos\alpha&-\sin\alpha&0\\
+\sin\alpha&\cos\alpha&0\\
+0&0&1
+\end{pmatrix}$};
+
+\coordinate (U) at (\Ux,3.2);
+\coordinate (Ux) at (\Ux,\Lx);
+\coordinate (Uy) at (\Ux,\Ly);
+\coordinate (Uz) at (\Ux,\Lz);
+\coordinate (Ex) at (\Ux,{\Lx-1});
+\coordinate (Ey) at (\Ux,{\Ly-1});
+\coordinate (Ez) at (\Ux,{\Lz-1});
+
+\uncover<2->{
+\node at (U) [right]
+	{\usebeamercolor[fg]{title}Ableitung, $\operatorname{so}(n)$\strut};
+
+\node at (Ux) [right] {$\displaystyle\tiny
+U_x=\begin{pmatrix*}[r]
+0&0&0\\
+0&0&-1\\
+0&1&0
+\end{pmatrix*}
+$};
+
+\node at (Uy) [right] {$\displaystyle\tiny
+U_y=\begin{pmatrix*}[r]
+0&0&1\\
+0&0&0\\
+-1&0&0
+\end{pmatrix*}
+$};
+
+\node at (Uz) [right] {$\displaystyle\tiny
+U_z=\begin{pmatrix*}[r]
+0&-1&0\\
+1&0&0\\
+0&0&0
+\end{pmatrix*}
+$};
+}
+
+\uncover<9->{
+\node at (Ex) [right] {$\displaystyle
+\, e_x = \tiny\begin{pmatrix}1\\0\\0\end{pmatrix}
+$};
+
+\node at (Ey) [right] {$\displaystyle
+\, e_y = \tiny\begin{pmatrix}0\\1\\0\end{pmatrix}
+$};
+
+\node at (Ez) [right] {$\displaystyle
+\, e_z = \tiny\begin{pmatrix}0\\0\\1\end{pmatrix}
+$};
+}
+
+\coordinate (K) at (\Kx,3.2);
+\coordinate (Kx) at (\Kx,\Lx);
+\coordinate (Ky) at (\Kx,\Ly);
+\coordinate (Kz) at (\Kx,\Lz);
+\coordinate (Vx) at (\Kx,{\Lx-1});
+\coordinate (Vy) at (\Kx,{\Ly-1});
+\coordinate (Vz) at (\Kx,{\Lz-1});
+
+\uncover<3->{
+\node at (K) [right]
+	{\usebeamercolor[fg]{title}Kommutator\strut};
+
+\node at (Kx) [right] {$\displaystyle
+\begin{aligned}
+[U_y,U_z] &\uncover<4->{= 
+{\tiny
+\begin{pmatrix}
+0&0&0\\
+0&0&0\\
+0&1&0
+\end{pmatrix}}
+\uncover<5->{\mathstrut-
+\tiny
+\begin{pmatrix}
+0&0&0\\
+0&0&1\\
+0&0&0
+\end{pmatrix}}}
+\uncover<6->{=U_x}
+\end{aligned}
+$};
+}
+
+\uncover<7->{
+\node at (Ky) [right] {$\displaystyle
+\begin{aligned}
+[U_z,U_x] &= 
+{\tiny
+\begin{pmatrix}
+0&0&1\\
+0&0&0\\
+0&0&0
+\end{pmatrix}
+-
+\begin{pmatrix}
+0&0&0\\
+0&0&0\\
+1&0&0
+\end{pmatrix}}
+=U_y
+\end{aligned}
+$};
+}
+
+\uncover<8->{
+\node at (Kz) [right] {$\displaystyle
+\begin{aligned}
+[U_x,U_y] &= 
+{\tiny
+\begin{pmatrix}
+0&0&0\\
+1&0&0\\
+0&0&0
+\end{pmatrix}
+-
+\begin{pmatrix}
+0&1&0\\
+0&0&0\\
+0&0&0
+\end{pmatrix}}
+=U_z
+\end{aligned}
+$};
+}
+
+\uncover<10->{
+\node at (Vx) [right] {$\displaystyle \phantom{]}e_y\times e_z = e_x$};
+}
+
+\uncover<11->{
+\node at (Vy) [right] {$\displaystyle \phantom{]}e_z\times e_x = e_y$};
+}
+
+\uncover<12->{
+\node at (Vz) [right] {$\displaystyle \phantom{]}e_x\times e_y = e_z$};
+}
+
+\end{tikzpicture}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/Makefile.inc b/vorlesungen/slides/8/Makefile.inc
index d46dc7f..6ac5665 100644
--- a/vorlesungen/slides/8/Makefile.inc
+++ b/vorlesungen/slides/8/Makefile.inc
@@ -28,5 +28,25 @@ chapter8 =								\
 	../slides/8/tokyo/bahn0.tex					\
 	../slides/8/tokyo/bahn1.tex					\
 	../slides/8/tokyo/bahn2.tex					\
+	../slides/8/chrind.tex						\
+	../slides/8/chrindprop.tex					\
+	../slides/8/chroma1.tex						\
+	../slides/8/amax.tex						\
+	../slides/8/subgraph.tex					\
+	../slides/8/chrwilf.tex						\
+	../slides/8/weitere.tex						\
+	../slides/8/wavelets/funktionen.tex				\
+	../slides/8/wavelets/laplacebasis.tex				\
+	../slides/8/wavelets/vektoren.tex				\
+	../slides/8/wavelets/fourier.tex				\
+	../slides/8/wavelets/lokalisierungsvergleich.tex		\
+	../slides/8/wavelets/frequenzlokalisierung.tex			\
+	../slides/8/wavelets/dilatation.tex				\
+	../slides/8/wavelets/matrixdilatation.tex			\
+	../slides/8/wavelets/gundh.tex					\
+	../slides/8/wavelets/dilbei.tex					\
+	../slides/8/wavelets/frame.tex					\
+	../slides/8/wavelets/framekonstanten.tex			\
+	../slides/8/wavelets/beispiel.tex				\
 	../slides/8/chapter.tex
 
diff --git a/vorlesungen/slides/8/amax.tex b/vorlesungen/slides/8/amax.tex
new file mode 100644
index 0000000..951400a
--- /dev/null
+++ b/vorlesungen/slides/8/amax.tex
@@ -0,0 +1,86 @@
+%
+% amax.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{$\alpha_{\text{max}}$ und $d$}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.44\textwidth}
+\begin{block}{Definition}
+$\alpha_{\text{max}}$ ist der grösste Eigenwert der Adjazenzmatrix
+\end{block}
+\uncover<2->{
+\begin{block}{Fakten}
+\begin{itemize}
+\item<3->
+Der Eigenwert $\alpha_{\text{max}}$ ist einfach
+\item<4->
+Es gibt einen positiven Eigenvektor $f$ zum Eigenwert $\alpha_{\text{max}}$
+\item<5->
+$f$ maximiert
+\[
+\frac{\langle Af,f\rangle}{\langle f,f\rangle}
+=
+\alpha_{\text{max}}
+\]
+\end{itemize}
+Herkunft: Perron-Frobenius-Theorie positiver Matrizen (nächste Woche)
+\end{block}}
+\end{column}
+\begin{column}{0.52\textwidth}
+\uncover<6->{%
+\begin{block}{Mittlerer Grad}
+\[
+\overline{d}
+=
+\frac1{n} \sum_{v} \operatorname{deg}(v)
+\le
+\alpha_{\text{max}}
+\le
+d
+\]
+\end{block}}
+\vspace{-10pt}
+\uncover<7->{%
+\begin{proof}[Beweis]
+\begin{itemize}
+\item Konstante Funktion $1$ anstelle von $f$:
+\[
+\frac{\langle A1,1\rangle}{\langle 1,1\rangle}
+\uncover<8->{=
+\frac{\sum_v \operatorname{deg}(v)}{n}}
+\uncover<9->{=
+\overline{d}}
+\uncover<10->{\le
+\alpha_{\text{max}}}
+\]
+\item<11-> Komponenten von $Af$ summieren:
+\begin{align*}
+\uncover<12->{
+\alpha_{\text{max}}
+f(v) &= (Af)(v)}\uncover<13->{ = \sum_{u\sim v} f(u)}
+\\
+\uncover<14->{\alpha_{\text{max}}
+\sum_{v}f(v)
+&=
+\sum_v
+\operatorname{deg}(v) f(v)}
+\\
+&\uncover<15->{\le
+d\sum_v f(v)}
+\;
+\uncover<16->{\Rightarrow
+\;
+\alpha_{\text{max}} \le d}
+\end{align*}
+\end{itemize}
+\end{proof}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/chapter.tex b/vorlesungen/slides/8/chapter.tex
index 6a0b13f..69b7231 100644
--- a/vorlesungen/slides/8/chapter.tex
+++ b/vorlesungen/slides/8/chapter.tex
@@ -30,3 +30,24 @@
 \folie{8/tokyo/bahn1.tex}
 \folie{8/tokyo/bahn2.tex}
 
+\folie{8/chrind.tex}
+\folie{8/chrindprop.tex}
+\folie{8/chroma1.tex}
+\folie{8/amax.tex}
+\folie{8/subgraph.tex}
+\folie{8/chrwilf.tex}
+\folie{8/weitere.tex}
+
+\folie{8/wavelets/funktionen.tex}
+\folie{8/wavelets/laplacebasis.tex}
+\folie{8/wavelets/fourier.tex}
+\folie{8/wavelets/lokalisierungsvergleich.tex}
+\folie{8/wavelets/frequenzlokalisierung.tex}
+\folie{8/wavelets/dilatation.tex}
+\folie{8/wavelets/matrixdilatation.tex}
+\folie{8/wavelets/gundh.tex}
+\folie{8/wavelets/frame.tex}
+\folie{8/wavelets/dilbei.tex}
+\folie{8/wavelets/framekonstanten.tex}
+\folie{8/wavelets/beispiel.tex}
+
diff --git a/vorlesungen/slides/8/chrind.tex b/vorlesungen/slides/8/chrind.tex
new file mode 100644
index 0000000..bd406ab
--- /dev/null
+++ b/vorlesungen/slides/8/chrind.tex
@@ -0,0 +1,231 @@
+%
+% chrind.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Chromatische Zahl und Unabhängigkeitszahl}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Chromatische Zahl}
+$\operatorname{chr}(G)=\mathstrut$
+minimale Anzahl Farben, die zum Einfärben eines Graphen $G$ nötig sind derart,
+dass benachbarte Knoten verschiedene Farben haben.
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+
+\def\Ra{2}
+\def\Ri{1}
+\def\e{1.0}
+\def\r{0.2}
+
+\definecolor{rot}{rgb}{0.8,0,0.8}
+\definecolor{gruen}{rgb}{0.2,0.6,0.2}
+\definecolor{blau}{rgb}{1,0.6,0.2}
+
+\coordinate (PA) at ({\Ri*sin(0*72)},{\e*\Ri*cos(0*72)});
+\coordinate (PB) at ({\Ri*sin(1*72)},{\e*\Ri*cos(1*72)});
+\coordinate (PC) at ({\Ri*sin(2*72)},{\e*\Ri*cos(2*72)});
+\coordinate (PD) at ({\Ri*sin(3*72)},{\e*\Ri*cos(3*72)});
+\coordinate (PE) at ({\Ri*sin(4*72)},{\e*\Ri*cos(4*72)});
+
+\coordinate (QA) at ({\Ra*sin(0*72)},{\e*\Ra*cos(0*72)});
+\coordinate (QB) at ({\Ra*sin(1*72)},{\e*\Ra*cos(1*72)});
+\coordinate (QC) at ({\Ra*sin(2*72)},{\e*\Ra*cos(2*72)});
+\coordinate (QD) at ({\Ra*sin(3*72)},{\e*\Ra*cos(3*72)});
+\coordinate (QE) at ({\Ra*sin(4*72)},{\e*\Ra*cos(4*72)});
+
+\draw (PA)--(PC)--(PE)--(PB)--(PD)--cycle;
+\draw (QA)--(QB)--(QC)--(QD)--(QE)--cycle;
+\draw (PA)--(QA);
+\draw (PB)--(QB);
+\draw (PC)--(QC);
+\draw (PD)--(QD);
+\draw (PE)--(QE);
+
+\only<1>{
+        \fill[color=white] (PA) circle[radius=\r];
+        \fill[color=white] (PB) circle[radius=\r];
+        \fill[color=white] (PC) circle[radius=\r];
+        \fill[color=white] (PD) circle[radius=\r];
+        \fill[color=white] (PE) circle[radius=\r];
+        \fill[color=white] (QA) circle[radius=\r];
+        \fill[color=white] (QB) circle[radius=\r];
+        \fill[color=white] (QC) circle[radius=\r];
+        \fill[color=white] (QD) circle[radius=\r];
+        \fill[color=white] (QE) circle[radius=\r];
+}
+
+\only<2->{
+        \fill[color=blau] (PA) circle[radius=\r];
+        \fill[color=rot] (PB) circle[radius=\r];
+        \fill[color=rot] (PC) circle[radius=\r];
+        \fill[color=gruen] (PD) circle[radius=\r];
+        \fill[color=gruen] (PE) circle[radius=\r];
+
+        \fill[color=rot] (QA) circle[radius=\r];
+        \fill[color=blau] (QB) circle[radius=\r];
+        \fill[color=gruen] (QC) circle[radius=\r];
+        \fill[color=rot] (QD) circle[radius=\r];
+        \fill[color=blau] (QE) circle[radius=\r];
+}
+
+\draw (PA) circle[radius=\r];
+\draw (PB) circle[radius=\r];
+\draw (PC) circle[radius=\r];
+\draw (PD) circle[radius=\r];
+\draw (PE) circle[radius=\r];
+
+\draw (QA) circle[radius=\r];
+\draw (QB) circle[radius=\r];
+\draw (QC) circle[radius=\r];
+\draw (QD) circle[radius=\r];
+\draw (QE) circle[radius=\r];
+
+\node at ($0.5*(QC)+0.5*(QD)+(0,-0.2)$) [below] {$\operatorname{chr} G = 3$};
+
+\end{tikzpicture}
+\end{center}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<3->{%
+\begin{block}{Unabhängigkeitszahl}
+$\operatorname{ind}(G)=\mathstrut$
+maximale Anzahl nicht benachbarter Knoten
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+
+\def\Ra{2}
+\def\Ri{1}
+\def\e{1.0}
+\def\r{0.2}
+
+\definecolor{rot}{rgb}{0.8,0,0.8}
+\definecolor{gruen}{rgb}{0.2,0.6,0.2}
+\definecolor{blau}{rgb}{1,0.6,0.2}
+\definecolor{gelb}{rgb}{0,0,1}
+
+\coordinate (PA) at ({\Ri*sin(0*72)},{\e*\Ri*cos(0*72)});
+\coordinate (PB) at ({\Ri*sin(1*72)},{\e*\Ri*cos(1*72)});
+\coordinate (PC) at ({\Ri*sin(2*72)},{\e*\Ri*cos(2*72)});
+\coordinate (PD) at ({\Ri*sin(3*72)},{\e*\Ri*cos(3*72)});
+\coordinate (PE) at ({\Ri*sin(4*72)},{\e*\Ri*cos(4*72)});
+
+\coordinate (QA) at ({\Ra*sin(0*72)},{\e*\Ra*cos(0*72)});
+\coordinate (QB) at ({\Ra*sin(1*72)},{\e*\Ra*cos(1*72)});
+\coordinate (QC) at ({\Ra*sin(2*72)},{\e*\Ra*cos(2*72)});
+\coordinate (QD) at ({\Ra*sin(3*72)},{\e*\Ra*cos(3*72)});
+\coordinate (QE) at ({\Ra*sin(4*72)},{\e*\Ra*cos(4*72)});
+
+\draw (PA)--(PC)--(PE)--(PB)--(PD)--cycle;
+\draw (QA)--(QB)--(QC)--(QD)--(QE)--cycle;
+\draw (PA)--(QA);
+\draw (PB)--(QB);
+\draw (PC)--(QC);
+\draw (PD)--(QD);
+\draw (PE)--(QE);
+
+\foreach \n in {1,...,7}{
+	\only<\n>{\node[color=white] at (1,2.9) {$\n$};}
+}
+
+\fill[color=white] (PA) circle[radius=\r];
+\fill[color=white] (PB) circle[radius=\r];
+\fill[color=white] (PC) circle[radius=\r];
+\fill[color=white] (PD) circle[radius=\r];
+\fill[color=white] (PE) circle[radius=\r];
+\fill[color=white] (QA) circle[radius=\r];
+\fill[color=white] (QB) circle[radius=\r];
+\fill[color=white] (QC) circle[radius=\r];
+\fill[color=white] (QD) circle[radius=\r];
+\fill[color=white] (QE) circle[radius=\r];
+
+\only<4->{
+        \fill[color=rot] (QA) circle[radius={1.5*\r}];
+        \fill[color=rot!40] (QB) circle[radius=\r];
+        \fill[color=rot!40] (QE) circle[radius=\r];
+        \fill[color=rot!40] (PA) circle[radius=\r];
+}
+
+\only<5->{
+        \fill[color=blau] (PB) circle[radius={1.5*\r}];
+        \fill[color=blau!40] (PD) circle[radius=\r];
+        \fill[color=blau!40] (PE) circle[radius=\r];
+        \fill[color=blau!80,opacity=0.5] (QB) circle[radius=\r];
+}
+
+\only<6->{
+        \fill[color=gruen] (PC) circle[radius={1.5*\r}];
+        \fill[color=gruen!40] (QC) circle[radius=\r];
+        \fill[color=gruen!80,opacity=0.5] (PA) circle[radius=\r];
+        \fill[color=gruen!80,opacity=0.5] (PE) circle[radius=\r];
+}
+
+\only<7->{
+        \fill[color=gelb] (QD) circle[radius={1.5*\r}];
+        \fill[color=gelb!80,opacity=0.5] (QC) circle[radius=\r];
+        \fill[color=gelb!80,opacity=0.5] (QE) circle[radius=\r];
+        \fill[color=gelb!80,opacity=0.5] (PD) circle[radius=\r];
+}
+
+\only<-3|handout:0>{
+	\draw (QA) circle[radius=\r];
+}
+\only<4->{
+	\draw (QA) circle[radius={1.5*\r}];
+}
+
+\only<-4|handout:0>{
+	\draw (PB) circle[radius=\r];
+}
+\only<5->{
+	\draw (PB) circle[radius={1.5*\r}];
+}
+
+\only<-5|handout:0>{
+	\draw (PC) circle[radius=\r];
+}
+\only<6->{
+	\draw (PC) circle[radius={1.5*\r}];
+}
+
+\only<-6|handout:0>{
+	\draw (QD) circle[radius=\r];
+}
+\only<7->{
+	\draw (QD) circle[radius={1.5*\r}];
+}
+
+\draw (PA) circle[radius=\r];
+\draw (PD) circle[radius=\r];
+\draw (PE) circle[radius=\r];
+
+\draw (QB) circle[radius=\r];
+\draw (QC) circle[radius=\r];
+\draw (QE) circle[radius=\r];
+
+\only<4|handout:0>{
+\node at ($0.5*(QC)+0.5*(QD)+(0,-0.2)$) [below] {$\operatorname{ind} G = 1$};
+}
+\only<5|handout:0>{
+\node at ($0.5*(QC)+0.5*(QD)+(0,-0.2)$) [below] {$\operatorname{ind} G = 2$};
+}
+\only<6|handout:0>{
+\node at ($0.5*(QC)+0.5*(QD)+(0,-0.2)$) [below] {$\operatorname{ind} G = 3$};
+}
+\only<7->{
+\node at ($0.5*(QC)+0.5*(QD)+(0,-0.2)$) [below] {$\operatorname{ind} G = 4$};
+}
+
+\end{tikzpicture}
+\end{center}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/chrindprop.tex b/vorlesungen/slides/8/chrindprop.tex
new file mode 100644
index 0000000..094588c
--- /dev/null
+++ b/vorlesungen/slides/8/chrindprop.tex
@@ -0,0 +1,62 @@
+%
+% chrindprop.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Zusammenhang zwischen $\operatorname{chr}G$ und $\operatorname{ind}G$}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.38\textwidth}
+\begin{block}{Proposition}
+Ist $G$ ein Graph mit $n$ Knoten, dann gilt
+\[
+\operatorname{chr}G
+\cdot
+\operatorname{ind}G
+\ge n
+\]
+\end{block}
+\uncover<2->{%
+\begin{block}{Beispiel}
+Peterson-Graph $K$ hat $n=10$ Knoten:
+\[
+\operatorname{chr}(K)
+\cdot
+\operatorname{ind}(K)
+=
+3\cdot 4
+\ge 
+10
+=
+n
+\]
+\end{block}}
+\end{column}
+\begin{column}{0.58\textwidth}
+\uncover<3->{%
+\begin{proof}[Beweis]
+\begin{itemize}
+\item<4-> eine minimale Färbung hat $\operatorname{chr}(G)$ Farben
+\item<5-> Sie teilt die Knoten in $\operatorname{chr}(G)$
+gleichfarbige Mengen auf
+\item<6-> Jede einfarbige Menge von Knoten ist unabhängig, d.~h.~sie 
+besteht aus Knoten, die nicht miteinander verbunden sind.
+\item<7-> Jede einfarbige Menge enthält höchstens $\operatorname{ind}(G)$
+\item<8-> Die Gesamtzahl der Knoten ist
+\[
+n\uncover<9->{=\sum_{\text{Farbe}}\underbrace{|V_{\text{Farbe}}|}_{\le \operatorname{ind}(G)}}
+\uncover<10->{\le
+\operatorname{chr}(G)
+\cdot
+\operatorname{ind}(G)}
+\]
+\end{itemize}
+\end{proof}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/chroma1.tex b/vorlesungen/slides/8/chroma1.tex
new file mode 100644
index 0000000..6a55704
--- /dev/null
+++ b/vorlesungen/slides/8/chroma1.tex
@@ -0,0 +1,56 @@
+%
+% chroma1.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Schranke für $\operatorname{chr}(G)$}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.40\textwidth}
+\begin{block}{Proposition}
+Ist $G$ ein Graph mit maximalem Grad $d$, dann gilt
+\[
+\operatorname{chr}(G) \le d + 1
+\]
+\end{block}
+\uncover<2->{%
+\begin{block}{Beispiel}
+\begin{itemize}
+\item<3->
+Peterson-Graph $G$: maximaler Grad ist $d=3$, aber
+\[
+\operatorname{chr}(G)
+=
+3
+< d+1=4
+\]
+\item<4->
+Voller Graph $V$: maximaler Grad ist $d=n-1$,
+\[
+\operatorname{chr}(V) = n = d+1
+\]
+\end{itemize}
+\end{block}}
+\end{column}
+\begin{column}{0.58\textwidth}
+\uncover<4->{%
+\begin{proof}[Beweis]
+Mit vollständiger Induktion, d.~h.~Annahme: Graphen mit $<n$ Knoten und
+maximalem Grad $d$ lassen sich mit höchstens $d+1$ Farben färben.
+\begin{itemize}
+\item<5-> $X$ ein Graph mit $n$ Knoten
+\item<6-> entferne den Knoten $v\in X$, $X'=X\setminus\{v\}$
+\item<7-> $X'$ lässt sich mit höchstens $d+1$ Farben einfärben
+\item<8-> $v$ hat höchstens $d$ Nachbarn, die höchsten $d$ verschiedene
+Farben haben
+\item<9-> Es bleibt eine Farbe für $v$
+\end{itemize}
+\end{proof}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/chrwilf.tex b/vorlesungen/slides/8/chrwilf.tex
new file mode 100644
index 0000000..7edb10e
--- /dev/null
+++ b/vorlesungen/slides/8/chrwilf.tex
@@ -0,0 +1,115 @@
+%
+% chrwilf.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\def\kante#1#2{
+	\draw[shorten >= 0.2cm,shorten <= 0.2cm] (#1) -- (#2);
+}
+\def\knoten#1#2{
+	\uncover<8->{
+		\fill[color=#2!30] (#1) circle[radius=0.2];
+		\draw[color=#2] (#1) circle[radius=0.2];
+	}
+	\only<-7>{
+		\draw (#1) circle[radius=0.2];
+	}
+}
+\def\R{1.5}
+\definecolor{rot}{rgb}{1,0,0}
+\definecolor{gruen}{rgb}{0,0.6,0}
+\definecolor{blau}{rgb}{0,0,1}
+\begin{frame}[t]
+\frametitle{Schranke für die chromatische Zahl}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Satz (Wilf)}
+$\uncover<2->{\operatorname{chr}(X) \le 1+}\alpha_{\text{max}} \le\uncover<2->{ 1 + }d$
+\end{block}
+\uncover<3->{%
+\begin{block}{Beispiel}
+\begin{align*}
+\uncover<4->{d&= 4}
+&&\uncover<5->{\Rightarrow& \operatorname{chr}(G) &\le 5}\\
+\uncover<6->{\alpha_{\text{max}} &= 
+2.9565}
+&&\uncover<7->{\Rightarrow& \operatorname{chr}(G) &\le 3}\\
+\uncover<4->{\overline{d} &= \frac{24}{9}=\rlap{$2.6666$}}
+\end{align*}
+\vspace{-20pt}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+
+\coordinate (A) at (0:\R);
+\coordinate (B) at (40:\R);
+\coordinate (C) at (80:\R);
+\coordinate (D) at (120:\R);
+\coordinate (E) at (160:\R);
+\coordinate (F) at (200:\R);
+\coordinate (G) at (240:\R);
+\coordinate (H) at (280:\R);
+\coordinate (I) at (320:\R);
+
+\knoten{A}{rot}
+\knoten{B}{blau}
+\knoten{C}{gruen}
+\knoten{D}{blau}
+\knoten{E}{rot}
+\knoten{F}{blau}
+\knoten{G}{rot}
+\knoten{H}{gruen}
+\knoten{I}{blau}
+
+\kante{A}{B}
+\kante{B}{C}
+\kante{C}{D}
+\kante{D}{E}
+\kante{E}{F}
+\kante{F}{G}
+\kante{G}{H}
+\kante{H}{I}
+\kante{I}{A}
+
+\kante{A}{C}
+\kante{A}{D}
+\kante{D}{G}
+
+\end{tikzpicture}
+\end{center}
+\end{block}}
+\end{column}
+\begin{column}{0.52\textwidth}
+\uncover<9->{%
+\begin{proof}[Beweis]
+Induktion nach der Grösse $n$ des Graphen.
+\begin{itemize}
+\item<10->
+Entferne $v\in X$ mit minimalem Grad: $X'=X\setminus \{v\}$
+\item<11->
+Induktionsannahme:
+\[
+\operatorname{chr}(X')
+\le
+1+
+\alpha_{\text{max}}' 
+\]
+\item<12->
+$X'$ kann mit höhcstens $1+\alpha_{\text{max}}'\le 1+\alpha_{\text{max}}$
+Farben eingefärbt werden.
+\item<13->
+Wegen
+\(
+\deg(v) \le \overline{d} \le \alpha_{\text{max}}
+\)
+hat $v$ höchstens $\alpha_{\text{max}}$ Nachbarn, um $v$ zu färben,
+braucht man also höchstens $1+\alpha_{\text{max}}$ Farben.
+\end{itemize}
+\end{proof}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/inzidenz.tex b/vorlesungen/slides/8/inzidenz.tex
index 952c85b..10f88cd 100644
--- a/vorlesungen/slides/8/inzidenz.tex
+++ b/vorlesungen/slides/8/inzidenz.tex
@@ -5,6 +5,8 @@
 %
 \bgroup
 \definecolor{darkgreen}{rgb}{0,0.6,0}
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
 \begin{frame}[t]
 \frametitle{Inzidenz- und Adjazenzmatrix}
 \vspace{-20pt}
@@ -67,7 +69,7 @@
 \vspace{-10pt}
 \uncover<5->{%
 \begin{block}{Definition}
-\vspace{-15pt}
+%\vspace{-15pt}
 \begin{align*}
 B(G)_{ij}&=1&&\Leftrightarrow&&\text{Kante $j$ endet in Knoten $i$}\\
 A(G)_{ij}&=1&&\Leftrightarrow&&\text{Kante zwischen Knoten $i$ und $j$}
diff --git a/vorlesungen/slides/8/inzidenzd.tex b/vorlesungen/slides/8/inzidenzd.tex
index 5f2f51a..43e5330 100644
--- a/vorlesungen/slides/8/inzidenzd.tex
+++ b/vorlesungen/slides/8/inzidenzd.tex
@@ -5,6 +5,8 @@
 %
 \bgroup
 \definecolor{darkgreen}{rgb}{0,0.6,0}
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
 \begin{frame}[t]
 \frametitle{Inzidenz- und Adjazenz-Matrix}
 \vspace{-20pt}
@@ -67,7 +69,7 @@
 \vspace{-15pt}
 \uncover<5->{%
 \begin{block}{Definition}
-\vspace{-20pt}
+%\vspace{-20pt}
 \begin{align*}
 B(G)_{ij}&=-1&&\Leftrightarrow&&\text{Kante $j$ von $i$}\\
 B(G)_{kj}&=+1&&\Leftrightarrow&&\text{Kante $j$ nach $k$}\\
diff --git a/vorlesungen/slides/8/produkt.tex b/vorlesungen/slides/8/produkt.tex
index 1d8b725..93333bc 100644
--- a/vorlesungen/slides/8/produkt.tex
+++ b/vorlesungen/slides/8/produkt.tex
@@ -56,7 +56,7 @@
 \end{center}
 \vspace{-15pt}
 \begin{block}{Berechne}
-\vspace{-20pt}
+%\vspace{-20pt}
 \begin{align*}
 \uncover<4->{L(G)}&\uncover<4->{=}B(G)B(G)^t
 \end{align*}
diff --git a/vorlesungen/slides/8/spanningtree.tex b/vorlesungen/slides/8/spanningtree.tex
index 425fe1c..62180d9 100644
--- a/vorlesungen/slides/8/spanningtree.tex
+++ b/vorlesungen/slides/8/spanningtree.tex
@@ -3,6 +3,7 @@
 %
 % (c) 2019 Prof Dr Andreas Müller, Hochschule Rapperswil
 %
+\bgroup
 \begin{frame}
 \frametitle{Spannbäume}
 
@@ -121,7 +122,7 @@ Wieviele Spannbäume gibt es?
 \begin{column}{0.56\hsize}
 \uncover<5->{%
 \begin{block}{Laplace-Matrix}
-\vspace{-15pt}
+%\vspace{-15pt}
 \[
 L=
 \tiny
@@ -162,3 +163,4 @@ L\text{ ohne }\left\{\begin{array}{c}\text{Zeile $i$}\\\text{Spalte $j$}\end{arr
 \end{columns}
 
 \end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/subgraph.tex b/vorlesungen/slides/8/subgraph.tex
new file mode 100644
index 0000000..f3005f9
--- /dev/null
+++ b/vorlesungen/slides/8/subgraph.tex
@@ -0,0 +1,60 @@
+%
+% subgraph.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{$\alpha_{\text{max}}$ eines Untergraphen}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Satz}
+$X'$ ein echter Untergraph von $X$ mit Adjazenzmatrix $A'$ und grösstem
+Eigenwert $\alpha_{\text{max}}'$
+\[
+\alpha_{\text{max}}' \le \alpha_{\text{max}}
+\]
+\end{block}
+\uncover<2->{$V'$ die Knoten von $X'$}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<3->{%
+\begin{proof}[Beweis]
+\begin{itemize}
+\item<4->
+$f'$ der positive Eigenvektor von $A'$
+\item<5->
+Definiere 
+\[
+g(v)
+=
+\begin{cases}
+f'(v) &\qquad v\in V'\\
+0     &\qquad \text{sonst}
+\end{cases}
+\]
+\item<6-> Skalarprodukte:
+\begin{align*}
+\uncover<7->{\langle f',f'\rangle &= \langle g,g\rangle}
+\\
+\uncover<8->{\langle A'f',f'\rangle &\le \langle Ag,g\rangle}
+\end{align*}
+\item<9-> Vergleich
+\[
+\alpha_{\text{max}}'
+=
+\frac{\langle A'f',f'\rangle}{\langle f',f'\rangle}
+\uncover<10->{\le 
+\frac{\langle Ag,g\rangle}{\langle g,g\rangle}}
+\uncover<11->{\le
+\alpha_{\text{max}}}
+\]
+\end{itemize}
+\end{proof}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/wavelets/Makefile b/vorlesungen/slides/8/wavelets/Makefile
new file mode 100644
index 0000000..3b4a5ce
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile
+#
+# (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+#
+
+vektoren.tex:	ev.m
+	octave ev.m
diff --git a/vorlesungen/slides/8/wavelets/beispiel.tex b/vorlesungen/slides/8/wavelets/beispiel.tex
new file mode 100644
index 0000000..dcc33d4
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/beispiel.tex
@@ -0,0 +1,44 @@
+%
+% beispiel.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\def\bild#1#2{
+\node at (0,0) [rotate=-90]
+{\includegraphics[width=#1\textwidth]{../../../SeminarWavelets/buch/papers/sgwt/images/#2}};
+}
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Wavelets auf einer Kugel}
+\vspace{-10pt}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+
+\only<1>{ \bild{0.6}{wavelets-phi-sphere-334.pdf} }
+
+\only<2>{ \bild{0.6}{wavelets-psi-5-sphere-334.pdf} }
+\only<3>{ \bild{0.6}{wavelets-psi-4-sphere-334.pdf} }
+\only<4>{ \bild{0.6}{wavelets-psi-3-sphere-334.pdf} }
+\only<5>{ \bild{0.6}{wavelets-psi-2-sphere-334.pdf} }
+\only<6>{ \bild{0.6}{wavelets-psi-1-sphere-334.pdf} }
+
+\only<1>{ \node at (-7.6,2.8) [right] {Bandpass mit $g_1$}; }
+\only<2>{ \node at (-7.6,2.8) [right] {Bandpass mit $g_2$}; }
+\only<3>{ \node at (-7.6,2.8) [right] {Bandpass mit $g_3$}; }
+\only<4>{ \node at (-7.6,2.8) [right] {Bandpass mit $g_4$}; }
+\only<5>{ \node at (-7.6,2.8) [right] {Bandpass mit $g_5$}; }
+\only<6>{ \node at (-7.6,2.8) [right] {Tiefpass mit $h$}; }
+
+\only<1>{ \node at (-7.6,2) [right] {$D_{g,1/a_1}\chi_*$}; }
+\only<2>{ \node at (-7.6,2) [right] {$D_{g,1/a_2}\chi_*$}; }
+\only<3>{ \node at (-7.6,2) [right] {$D_{g,1/a_3}\chi_*$}; }
+\only<4>{ \node at (-7.6,2) [right] {$D_{g,1/a_4}\chi_*$}; }
+\only<5>{ \node at (-7.6,2) [right] {$D_{g,1/a_5}\chi_*$}; }
+\only<6>{ \node at (-7.6,2) [right] {$D_{h}\chi_*$}; }
+
+\end{tikzpicture}
+\end{center}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/wavelets/dilatation.tex b/vorlesungen/slides/8/wavelets/dilatation.tex
new file mode 100644
index 0000000..881f760
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/dilatation.tex
@@ -0,0 +1,62 @@
+%
+% template.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Dilatation}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Dilatation in $\mathbb{R}$}
+$f\colon \mathbb{R}\to\mathbb{R}$
+Definition im Ortsraum:
+\[
+(D_af)(x)
+=
+\frac{1}{\sqrt{|a|}}
+f\biggl(\frac{x}{a}\biggr)
+\]
+\uncover<2->{%
+Dilatation im Frequenzraum:
+\[
+\widehat{D_af}(\omega)
+=
+D_{1/a}\hat{f}(\omega)
+\]}
+\uncover<3->{%
+Spektrum wird mit $1/a$ skaliert!}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<4->{%
+\begin{block}{``Dilatation'' auf einem Graphen}
+\begin{itemize}
+\item<5-> Dilatation auf dem Graphen gibt es nicht
+\item<6-> Dilatation im Spektrum $\{\lambda_1,\dots,\lambda_n\}$ gibt es nicht
+\item<7-> ``Spektrale Dilatation'' verwenden
+\begin{enumerate}
+\item<8-> Start: $e_k$
+\item<9-> Fourier-Transformation: $\chi^te_k$
+\item<10-> Spektrum skalieren: mit
+$D_{1/a}g$ filtern
+\item<11-> Rücktransformation
+\[
+D_{g,a}e_k
+=
+\chi
+\uncover<12->{\operatorname{diag}(\tilde{D}_{1/a}g(\lambda_*))
+\chi^t e_k}
+\]
+\end{enumerate}
+\end{itemize}
+
+
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/wavelets/dilbei.tex b/vorlesungen/slides/8/wavelets/dilbei.tex
new file mode 100644
index 0000000..fc66a0a
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/dilbei.tex
@@ -0,0 +1,46 @@
+%
+% beispiel.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\def\bild#1#2{
+\node at (0,0) [rotate=-90]
+{\includegraphics[width=#1\textwidth]{../../../SeminarWavelets/buch/papers/sgwt/images/#2}};
+}
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Wavelets einer Strecke}
+\vspace{-10pt}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+
+\only<1>{ \bild{0.6}{wavelets-psi-line-5-10.pdf} }
+\only<2>{ \bild{0.6}{wavelets-psi-line-4-10.pdf} }
+\only<3>{ \bild{0.6}{wavelets-psi-line-3-10.pdf} }
+\only<4>{ \bild{0.6}{wavelets-psi-line-2-10.pdf} }
+\only<5>{ \bild{0.6}{wavelets-psi-line-1-10.pdf} }
+
+\only<6>{ \bild{0.6}{wavelets-phi-line-10.pdf} }
+
+\only<1>{ \node at (-7.6,2.8) [right] {Bandpass mit $g_1$}; }
+\only<2>{ \node at (-7.6,2.8) [right] {Bandpass mit $g_2$}; }
+\only<3>{ \node at (-7.6,2.8) [right] {Bandpass mit $g_3$}; }
+\only<4>{ \node at (-7.6,2.8) [right] {Bandpass mit $g_4$}; }
+\only<5>{ \node at (-7.6,2.8) [right] {Bandpass mit $g_5$}; }
+\only<6>{ \node at (-7.6,2.8) [right] {Tiefpass mit $h$}; }
+
+
+\only<1>{ \node at (-7.6,2) [right] {$D_{g,1/a_1}\chi_*$}; }
+\only<2>{ \node at (-7.6,2) [right] {$D_{g,1/a_2}\chi_*$}; }
+\only<3>{ \node at (-7.6,2) [right] {$D_{g,1/a_3}\chi_*$}; }
+\only<4>{ \node at (-7.6,2) [right] {$D_{g,1/a_4}\chi_*$}; }
+\only<5>{ \node at (-7.6,2) [right] {$D_{g,1/a_5}\chi_*$}; }
+
+\only<6>{ \node at (-7.6,2) [right] {$D_{h}\chi_*$}; }
+
+\end{tikzpicture}
+\end{center}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/wavelets/ev.m b/vorlesungen/slides/8/wavelets/ev.m
new file mode 100644
index 0000000..7f4dd55
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/ev.m
@@ -0,0 +1,97 @@
+#
+# ev.m
+#
+# (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+#
+
+L = [
+    2, -1,  0, -1,  0;
+   -1,  4, -1, -1, -1;
+    0, -1,  2,  0, -1;
+   -1, -1,  0,  3, -1;
+    0, -1, -1, -1,  3
+];
+
+[v, lambda] = eig(L);
+
+function knoten(fn, wert, punkt)
+	if (wert > 0) 
+		farbe = sprintf("red!%02d", round(100 * wert));
+	else
+		farbe = sprintf("blue!%02d", round(-100 * wert));
+	end
+	fprintf(fn, "\t\\fill[color=%s] %s circle[radius=0.25];\n",
+		farbe, punkt);
+	fprintf(fn, "\t\\draw %s circle[radius=0.25];\n", punkt);
+endfunction
+
+function vektor(fn, v, name, lambda)
+	fprintf(fn, "\\def\\%s{\n", name);
+	fprintf(fn, "\t\\coordinate (A) at ({0*\\a},0);\n");
+	fprintf(fn, "\t\\coordinate (B) at ({1*\\a},0);\n");
+	fprintf(fn, "\t\\coordinate (C) at ({2*\\a},0);\n");
+	fprintf(fn, "\t\\coordinate (D) at ({0.5*\\a},{-\\b});\n");
+	fprintf(fn, "\t\\coordinate (E) at ({1.5*\\a},{-\\b});\n");
+	fprintf(fn, "\t\\draw (A) -- (B);\n");
+	fprintf(fn, "\t\\draw (A) -- (D);\n");
+	fprintf(fn, "\t\\draw (B) -- (C);\n");
+	fprintf(fn, "\t\\draw (B) -- (D);\n");
+	fprintf(fn, "\t\\draw (B) -- (E);\n");
+	fprintf(fn, "\t\\draw (C) -- (E);\n");
+	fprintf(fn, "\t\\draw (D) -- (E);\n");
+	fprintf(fn, "\t\\node at (-2.8,{-0.5*\\b}) [right] {$\\lambda=%.4f$};\n",
+		round(1000 * abs(lambda)) / 10000);
+	w = v / max(abs(v));
+	knoten(fn, w(1,1), "(A)");
+	knoten(fn, w(2,1), "(B)");
+	knoten(fn, w(3,1), "(C)");
+	knoten(fn, w(4,1), "(D)");
+	knoten(fn, w(5,1), "(E)");
+	fprintf(fn, "}\n");
+endfunction
+
+function punkt(fn, x, wert)
+	fprintf(fn, "({%.4f*\\c},{%.4f*\\d})", x, wert);
+endfunction
+
+function funktion(fn, v, name, lambda)
+	fprintf(fn, "\\def\\%s{\n", name);
+	fprintf(fn, "\t\\draw[color=red,line width=1.4pt]\n\t\t");
+	punkt(fn, -2, v(1,1));
+	fprintf(fn, " --\n\t\t");
+	punkt(fn, -1, v(4,1));
+	fprintf(fn, " --\n\t\t");
+	punkt(fn, 0, v(2,1));
+	fprintf(fn, " --\n\t\t");
+	punkt(fn, 1, v(5,1));
+	fprintf(fn, " --\n\t\t");
+	punkt(fn, 2, v(3,1));
+	fprintf(fn, ";\n");
+	fprintf(fn, "\t\\draw[->] ({-2.1*\\c},0) -- ({2.1*\\c},0);\n");
+	fprintf(fn, "\t\\draw[->] (0,{-1.1*\\d}) -- (0,{1.1*\\d});\n");
+	for x = (-2:2)
+		fprintf(fn, "\t\\fill ({%d*\\c},0) circle[radius=0.05];\n", x);
+	endfor
+	fprintf(fn, "}\n");
+endfunction
+
+fn = fopen("vektoren.tex", "w");
+
+vektor(fn, v(:,1), "vnull", lambda(1,1));
+funktion(fn, v(:,1), "fnull", lambda(1,1));
+
+vektor(fn, v(:,2), "vone", lambda(2,2));
+funktion(fn, v(:,2), "fone", lambda(2,2));
+
+vektor(fn, v(:,3), "vtwo", lambda(3,3));
+funktion(fn, v(:,3), "ftwo", lambda(3,3));
+
+vektor(fn, v(:,4), "vthree", lambda(4,4));
+funktion(fn, v(:,4), "fthree", lambda(4,4));
+
+vektor(fn, v(:,5), "vfour", lambda(5,5));
+funktion(fn, v(:,5), "ffour", lambda(5,5));
+
+fclose(fn);
+
+
diff --git a/vorlesungen/slides/8/wavelets/fourier.tex b/vorlesungen/slides/8/wavelets/fourier.tex
new file mode 100644
index 0000000..3195ec8
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/fourier.tex
@@ -0,0 +1,86 @@
+%
+% fourier.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Fourier-Transformation}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Aufgabe}
+Gegeben: Funktion $f$ auf dem Graphen
+\\
+\uncover<2->{%
+Gesucht: Koeffizienten $\hat{f}$ der Darstellung in der Laplace-Basis}
+\end{block}
+\uncover<3->{%
+\begin{block}{Definition $\chi$-Matrix}
+Eigenwerte $0=\lambda_1<\lambda_2\le \dots \le \lambda_n$ von $L$
+\vspace{-10pt}
+\begin{center}
+\begin{tikzpicture}
+\node at (-1.9,0) [left] {$\chi=\mathstrut$};
+\node at (0,0) {$\left(\raisebox{0pt}[1.7cm][1.7cm]{\hspace{3.5cm}}\right)$};
+
+\fill[color=blue!20] (-1.7,-1.7) rectangle (-1.1,1.7);
+\draw[color=blue] (-1.7,-1.7) rectangle (-1.1,1.7);
+\node at (-1.4,0) [rotate=90] {$v_1=\mathstrut$EV zum EW $\lambda_1$\strut};
+
+\fill[color=blue!20] (-1.0,-1.7) rectangle (-0.4,1.7);
+\draw[color=blue] (-1.0,-1.7) rectangle (-0.4,1.7);
+\node at (-0.7,0) [rotate=90] {$v_2=\mathstrut$EV zum EW $\lambda_2$\strut};
+
+\fill[color=blue!20] (1.1,-1.7) rectangle (1.7,1.7);
+\draw[color=blue] (1.1,-1.7) rectangle (1.7,1.7);
+\node at (1.4,0) [rotate=90] {$v_n=\mathstrut$EV zum EW $\lambda_n$\strut};
+
+\node at (0.4,0) {$\dots$};
+
+\end{tikzpicture}
+\end{center}
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<4->{%
+\begin{block}{Transformation}
+$L$ symmetrisch
+\\
+\uncover<5->{$\Rightarrow$ 
+Die Eigenvektoren von $L$ können orthonormiert gewählt werden}
+\\
+\uncover<6->{$\Rightarrow$ 
+Koeffizienten können durch Skalarprodukte ermittelt werden:}
+\uncover<7->{%
+\[
+\hat{f}(k)
+=
+\hat{f}(\lambda_k)
+\uncover<8->{=
+\langle v_k, f\rangle
+\quad\Rightarrow\quad
+\hat{f}}
+\uncover<9->{=
+\chi^tf}
+\]}
+\uncover<10->{%
+$\chi$ ist die {\em Fourier-Transformation}}
+\end{block}}
+\uncover<11->{%
+\begin{block}{Rücktransformation}
+Eigenvektoren orthonormiert
+\\
+\uncover<12->{$\Rightarrow$
+$\chi$ orthogonal}
+\uncover<13->{
+\[
+\chi\chi^t = I
+\]}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/wavelets/frame.tex b/vorlesungen/slides/8/wavelets/frame.tex
new file mode 100644
index 0000000..4d0c7d1
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/frame.tex
@@ -0,0 +1,66 @@
+%
+% template.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Graph Wavelet Frame}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Frame-Vektoren}
+Zu Dilatationsfaktoren $A=\{a_i\,|\,i=1,\dots,N\}$
+konstruiere das Frame
+\begin{align*}
+F=
+\{&D_he_1,\dots,D_he_n,\\
+  &Dg_1e_1,\dots,Dg_1e_n,\\
+  &Dg_2e_1,\dots,Dg_2e_n,\\
+  &\dots\\
+  &Dg_Ne_1,\dots,Dg_Ne_n\}
+\end{align*}
+\uncover<2->{Notation:
+\begin{align*}
+v_{0,k}
+&=
+D_he_k
+\\
+v_{i,k}
+&=
+Dg_ie_k
+\end{align*}}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<3->{%
+\begin{block}{Frameoperator}
+\begin{align*}
+\mathcal{T}\colon \mathbb{R}^n\to\mathbb{R}^{nN}
+:
+v
+&\mapsto
+\begin{pmatrix}
+\uncover<4->{\langle D_he_1,v\rangle}\\
+\uncover<4->{\vdots}\\
+\uncover<4->{\langle D_he_n,v\rangle}\\
+\hline
+\uncover<5->{\langle D_{g_1}e_1,v\rangle}\\
+\uncover<5->{\vdots}\\
+\uncover<5->{\langle D_{g_1}e_n,v\rangle}\\
+\hline
+\uncover<6->{\vdots}\\
+\uncover<6->{\vdots}\\
+\hline
+\uncover<7->{\langle D_{g_N}e_1,v\rangle}\\
+\uncover<7->{\vdots}\\
+\uncover<7->{\langle D_{g_N}e_n,v\rangle}
+\end{pmatrix}
+\end{align*}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/wavelets/framekonstanten.tex b/vorlesungen/slides/8/wavelets/framekonstanten.tex
new file mode 100644
index 0000000..a436536
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/framekonstanten.tex
@@ -0,0 +1,71 @@
+%
+% template.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+%\setlength{\abovedisplayskip}{5pt}
+%\setlength{\belowdisplayskip}{5pt}
+\frametitle{Framekonstanten}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Definition}
+Eine Menge $\mathcal{F}$ von Vektoren heisst ein Frame,
+falls es Konstanten $A$ und $B$ gibt derart, dass
+\[
+A\|v\|^2
+\le
+\|\mathcal{T}v\|^2
+\sum_{b\in\mathcal{F}} |\langle b,v\rangle|^2
+\le
+B\|v\|^2
+\]
+\uncover<2->{$A>0$ garantiert Invertierbarkeit}
+\end{block}
+\uncover<3->{%
+\begin{block}{$\|\mathcal{T}v\|$ für Graph-Wavelets}
+\begin{align*}
+\|\mathcal{T}v\|^2
+&=
+\sum_k |\langle D_he_k,v\rangle|^2
++
+\sum_{i,k} |\langle D_{g_i}e_k, v\rangle|^2
+\\
+&\uncover<4->{=
+\sum_k |h(\lambda_k) \hat{v}(k)|^2
++
+\sum_{k,i} |g_i(\lambda_k) \hat{v}(k)|^2}
+\end{align*}
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<5->{%
+\begin{block}{$A$ und $B$}
+Frame-Norm-Funktion
+\begin{align*}
+f(\lambda)
+&=
+h(\lambda)
++
+\sum_i g_i(\lambda)
+\\
+&\uncover<6->{=
+h(\lambda)
++
+\sum_i g(a_i\lambda)}
+\end{align*}
+\uncover<7->{Abschätzung für Frame-Konstanten
+\begin{align*}
+A&\uncover<8->{=
+\min_{i} f(\lambda_i)}
+\\
+B&\uncover<9->{=
+\max_{i} f(\lambda_i)}
+\end{align*}}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/wavelets/frequenzlokalisierung.tex b/vorlesungen/slides/8/wavelets/frequenzlokalisierung.tex
new file mode 100644
index 0000000..c78e6dd
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/frequenzlokalisierung.tex
@@ -0,0 +1,78 @@
+%
+% frequenzlokalisierung.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+
+\def\kurve#1#2{
+        \draw[color=#2,line width=1.4pt]
+                plot[domain=0:6.3,samples=400]
+                        ({\x},{7*\x*exp(-(\x/#1)*(\x/#1))/#1});
+}
+\definecolor{darkgreen}{rgb}{0,0.6,0}
+
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Lokalisierung}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Bandpass}
+Gegeben durch $g(\lambda)\ge 0$:
+\begin{align*}
+g(0)                             &= 0\\
+\lim_{\lambda\to\infty}g(\lambda)&= 0
+\end{align*}
+\vspace{-10pt}
+\begin{enumerate}
+\item<3-> Fourier-transformieren
+\item<4-> Amplituden mit $g(\lambda)$ multiplizieren
+\item<5-> Rücktransformieren
+\end{enumerate}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<6->{%
+\begin{block}{Tiefpass}
+Gegeben durch $h(\lambda)\ge0$:
+\begin{align*}
+h(0)                             &= 1\\
+\lim_{\lambda\to\infty}h(\lambda)&= 0
+\end{align*}
+\vspace{-10pt}
+\begin{enumerate}
+\item<8-> Fourier-Transformation
+\item<9-> Amplituden mit $h(\lambda)$ multiplizieren
+\item<10-> Rücktransformation
+\end{enumerate}
+\end{block}}
+\end{column}
+\end{columns}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick,scale=0.8]
+
+\uncover<2->{
+\begin{scope}[xshift=-4.5cm]
+\draw[->] (-0.1,0) -- (6.6,0) coordinate[label={$\lambda$}];
+\kurve{3}{red}
+\draw[->] (0,-0.1) -- (0,3.3);
+\end{scope}
+}
+
+\uncover<7->{
+\begin{scope}[xshift=4.5cm]
+\draw[->] (-0.1,0) -- (6.6,0) coordinate[label={$\lambda$}];
+\draw[color=darkgreen,line width=1.4pt]
+        plot[domain=0:6.3,samples=100]
+                ({\x},{3*exp(-(\x/0.5)*(\x/0.5)});
+
+\draw[->] (0,-0.1) -- (0,3.3) coordinate[label={right:$\color{darkgreen}h(\lambda)$}];
+\end{scope}
+}
+
+\end{tikzpicture}
+\end{center}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/wavelets/funktionen.tex b/vorlesungen/slides/8/wavelets/funktionen.tex
new file mode 100644
index 0000000..2e3ae9b
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/funktionen.tex
@@ -0,0 +1,78 @@
+%
+% funktionen.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\def\knoten#1#2{
+	\draw #1 circle[radius=0.25];
+	\node at #1 {$#2$};
+}
+\def\kante#1#2{
+	\draw[shorten >= 0.25cm,shorten <= 0.25cm] #1 -- #2;
+}
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Funktionen auf einem Graphen}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Definition}
+Ein Graph $G=(V,E)$, eine Funktion auf dem Graphen ist
+\[
+f\colon V \to \mathbb{R} : v\mapsto f(v)
+\]
+Knoten: $V=\{1,\dots,n\}$
+\\
+\uncover<2->{%
+Vektorschreibweise
+\[
+f = \begin{pmatrix}
+f(1)\\f(2)\\\vdots\\f(n)
+\end{pmatrix}
+\]}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<3->{%
+\begin{block}{Matrizen}
+Adjazenz-, Grad- und Laplace-Matrix operieren auf Funktionen auf Graphen:
+\[
+L
+=
+\begin{pmatrix*}[r]
+ 2&-1& 0&-1& 0\\
+-1& 4&-1&-1&-1\\
+ 0&-1& 2& 0&-1\\
+-1&-1& 0& 3&-1\\
+ 0&-1&-1&-1& 3\\
+\end{pmatrix*}
+\]
+\end{block}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+\def\a{2}
+\coordinate (A) at (0,0);
+\coordinate (B) at (\a,0);
+\coordinate (C) at ({2*\a},0);
+\coordinate (D) at ({0.5*\a},{-0.5*sqrt(3)*\a});
+\coordinate (E) at ({1.5*\a},{-0.5*sqrt(3)*\a});
+\knoten{(A)}{1}
+\knoten{(B)}{2}
+\knoten{(C)}{3}
+\knoten{(D)}{4}
+\knoten{(E)}{5}
+\kante{(A)}{(B)}
+\kante{(B)}{(C)}
+\kante{(A)}{(D)}
+\kante{(B)}{(D)}
+\kante{(B)}{(E)}
+\kante{(C)}{(E)}
+\kante{(D)}{(E)}
+\end{tikzpicture}
+\end{center}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/wavelets/gundh.tex b/vorlesungen/slides/8/wavelets/gundh.tex
new file mode 100644
index 0000000..2d6c677
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/gundh.tex
@@ -0,0 +1,85 @@
+%
+% template.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\definecolor{darkgreen}{rgb}{0,0.6,0}
+
+\def\kurve#1#2{
+        \draw[color=#2,line width=1.4pt]
+                plot[domain=0:6.3,samples=400]
+                        ({\x},{7*\x*exp(-(\x/#1)*(\x/#1))/#1});
+}
+
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Wavelets}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Mutterwavelets + Dilatation}
+Eine Menge von Dilatationsfaktoren
+\[
+A= \{a_1,a_2,\dots,a_N\}
+\]
+wählen\uncover<2->{, und mit Funktionen
+\[
+{\color{blue}g_i} = \tilde{D}_{1/a_i}{\color{red}g}
+\]
+die Standardbasisvektoren filtern}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<5->{
+\begin{block}{Vaterwavelets}
+Tiefpass mit Funktion ${\color{darkgreen}h(\lambda)}$,
+Standardbasisvektoren mit ${\color{darkgreen}h}$ filtern:
+\[
+D_{\color{darkgreen}h}e_k
+\]
+\end{block}}
+\end{column}
+\end{columns}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+\begin{scope}
+
+\draw[->] (-0.1,0) -- (6.6,0) coordinate[label={$\lambda$}];
+
+\kurve{1}{red}
+\uncover<4->{
+\foreach \k in {0,...,4}{
+        \pgfmathparse{0.30*exp(ln(2)*\k)}
+        \xdef\l{\pgfmathresult}
+        \kurve{\l}{blue}
+}
+}
+
+\node[color=red] at ({0.7*1},3) [above] {$g(\lambda)$};
+\uncover<4->{
+\node[color=blue] at ({0.7*0.3*16},3) [above] {$g_i(\lambda)$};
+}
+
+\draw[->] (0,-0.1) -- (0,3.3);
+\end{scope}
+
+\begin{scope}[xshift=7cm]
+
+\uncover<6->{
+\draw[->] (-0.1,0) -- (6.6,0) coordinate[label={$\lambda$}];
+
+\draw[color=darkgreen,line width=1.4pt]
+        plot[domain=0:6.3,samples=100]
+                ({\x},{3*exp(-(\x/0.5)*(\x/0.5)});
+
+\draw[->] (0,-0.1) -- (0,3.3) coordinate[label={right:$\color{darkgreen}h(\lambda)$}];
+}
+
+\end{scope}
+
+\end{tikzpicture}
+\end{center}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/wavelets/laplacebasis.tex b/vorlesungen/slides/8/wavelets/laplacebasis.tex
new file mode 100644
index 0000000..ced4c09
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/laplacebasis.tex
@@ -0,0 +1,62 @@
+%
+% template.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\def\a{2}
+\def\b{0.8}
+\def\c{1}
+\def\d{0.6}
+\input{../slides/8/wavelets/vektoren.tex}
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Laplace-Basis}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+
+\begin{scope}[yshift=-0.4cm,xshift=-5.5cm]
+\fnull
+\end{scope}
+
+\begin{scope}[yshift=-1.8cm,xshift=-5.5cm]
+\fone
+\end{scope}
+
+\begin{scope}[yshift=-3.2cm,xshift=-5.5cm]
+\ftwo
+\end{scope}
+
+\begin{scope}[yshift=-4.6cm,xshift=-5.5cm]
+\fthree
+\end{scope}
+
+\begin{scope}[yshift=-6.0cm,xshift=-5.5cm]
+\ffour
+\end{scope}
+
+\begin{scope}[yshift=0cm]
+\vnull
+\end{scope}
+
+\begin{scope}[yshift=-1.4cm]
+\vone
+\end{scope}
+
+\begin{scope}[yshift=-2.8cm]
+\vtwo
+\end{scope}
+
+\begin{scope}[yshift=-4.2cm]
+\vthree
+\end{scope}
+
+\begin{scope}[yshift=-5.6cm]
+\vfour
+\end{scope}
+
+\end{tikzpicture}
+\end{center}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/wavelets/lokalisierungsvergleich.tex b/vorlesungen/slides/8/wavelets/lokalisierungsvergleich.tex
new file mode 100644
index 0000000..d6575d0
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/lokalisierungsvergleich.tex
@@ -0,0 +1,46 @@
+%
+% lokalisierungsvergleich.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Lokalisierung}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Ortsraum}
+Ortsraum$\mathstrut=V$
+\begin{itemize}
+\item<3-> Standardbasis
+\item<5-> lokalisiert in den Knoten
+\item<7-> die meisten $\hat{f}(k)$ gross
+\item<9-> vollständig delokalisiert im Frequenzraum
+\end{itemize}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\begin{block}{Frequenzraum}
+\uncover<2->{Frequenzraum $\mathstrut=\{\lambda_1,\lambda_2,\dots,\lambda_n\}$}
+\begin{itemize}
+\item<4-> Laplace-Basis
+\item<6-> lokalisiert in den Eigenwerten
+\item<8-> die meisten Komponenten gross
+\item<10-> vollständig delokalisiert im Ortsraum
+\end{itemize}
+\end{block}
+\end{column}
+\end{columns}
+\uncover<11->{%
+\begin{block}{Plan}
+Gesucht sind Funktionen auf dem Graphen derart, die
+\begin{enumerate}
+\item<12-> in der Nähe einzelner Knoten konzentriert/lokalisiert sind und
+\item<13-> deren Fourier-Transformation in der Nähe einzelner Eigenwerte 
+konzentriert/lokalisiert ist
+\end{enumerate}
+\end{block}}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/wavelets/matrixdilatation.tex b/vorlesungen/slides/8/wavelets/matrixdilatation.tex
new file mode 100644
index 0000000..3536736
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/matrixdilatation.tex
@@ -0,0 +1,39 @@
+%
+% matrixdilatation.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Dilatation in Matrixform}
+Dilatationsfaktor $a$, skaliertes Wavelet beim Knoten $k$ mit Spektrum
+$\tilde{D}_{1/a}g$
+\begin{align*}
+D_{g,a}e_k
+&=
+\chi
+\begin{pmatrix}
+g(a\lambda_1)&      0      & \dots  &      0      \\
+      0      &g(a\lambda_2)& \dots  &      0      \\
+   \vdots    &    \vdots   & \ddots &    \vdots   \\
+      0      &      0      & \dots  &g(a\lambda_n)
+\end{pmatrix}
+\chi^t
+e_k
+\intertext{\uncover<2->{``verschmierter'' Standardbasisvektor am Knoten $k$}}
+\uncover<2->{D_he_k
+&=
+\chi
+\begin{pmatrix}
+h(\lambda_1)&     0      & \dots  &     0      \\
+     0      &h(\lambda_2)& \dots  &     0      \\
+  \vdots    &   \vdots   & \ddots &   \vdots   \\
+     0      &     0      & \dots  &h(\lambda_n)
+\end{pmatrix}
+\chi^t
+e_k}
+\end{align*}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/wavelets/vektoren.tex b/vorlesungen/slides/8/wavelets/vektoren.tex
new file mode 100644
index 0000000..2315d53
--- /dev/null
+++ b/vorlesungen/slides/8/wavelets/vektoren.tex
@@ -0,0 +1,200 @@
+\def\vnull{
+	\coordinate (A) at ({0*\a},0);
+	\coordinate (B) at ({1*\a},0);
+	\coordinate (C) at ({2*\a},0);
+	\coordinate (D) at ({0.5*\a},{-\b});
+	\coordinate (E) at ({1.5*\a},{-\b});
+	\draw (A) -- (B);
+	\draw (A) -- (D);
+	\draw (B) -- (C);
+	\draw (B) -- (D);
+	\draw (B) -- (E);
+	\draw (C) -- (E);
+	\draw (D) -- (E);
+	\node at (-2.8,{-0.5*\b}) [right] {$\lambda=0.0000$};
+	\fill[color=red!100] (A) circle[radius=0.25];
+	\draw (A) circle[radius=0.25];
+	\fill[color=red!100] (B) circle[radius=0.25];
+	\draw (B) circle[radius=0.25];
+	\fill[color=red!100] (C) circle[radius=0.25];
+	\draw (C) circle[radius=0.25];
+	\fill[color=red!100] (D) circle[radius=0.25];
+	\draw (D) circle[radius=0.25];
+	\fill[color=red!100] (E) circle[radius=0.25];
+	\draw (E) circle[radius=0.25];
+}
+\def\fnull{
+	\draw[color=red,line width=1.4pt]
+		({-2.0000*\c},{0.4472*\d}) --
+		({-1.0000*\c},{0.4472*\d}) --
+		({0.0000*\c},{0.4472*\d}) --
+		({1.0000*\c},{0.4472*\d}) --
+		({2.0000*\c},{0.4472*\d});
+	\draw[->] ({-2.1*\c},0) -- ({2.1*\c},0);
+	\draw[->] (0,{-1.1*\d}) -- (0,{1.1*\d});
+	\fill ({-2*\c},0) circle[radius=0.05];
+	\fill ({-1*\c},0) circle[radius=0.05];
+	\fill ({0*\c},0) circle[radius=0.05];
+	\fill ({1*\c},0) circle[radius=0.05];
+	\fill ({2*\c},0) circle[radius=0.05];
+}
+\def\vone{
+	\coordinate (A) at ({0*\a},0);
+	\coordinate (B) at ({1*\a},0);
+	\coordinate (C) at ({2*\a},0);
+	\coordinate (D) at ({0.5*\a},{-\b});
+	\coordinate (E) at ({1.5*\a},{-\b});
+	\draw (A) -- (B);
+	\draw (A) -- (D);
+	\draw (B) -- (C);
+	\draw (B) -- (D);
+	\draw (B) -- (E);
+	\draw (C) -- (E);
+	\draw (D) -- (E);
+	\node at (-2.8,{-0.5*\b}) [right] {$\lambda=0.1586$};
+	\fill[color=blue!100] (A) circle[radius=0.25];
+	\draw (A) circle[radius=0.25];
+	\fill[color=blue!00] (B) circle[radius=0.25];
+	\draw (B) circle[radius=0.25];
+	\fill[color=red!100] (C) circle[radius=0.25];
+	\draw (C) circle[radius=0.25];
+	\fill[color=blue!41] (D) circle[radius=0.25];
+	\draw (D) circle[radius=0.25];
+	\fill[color=red!41] (E) circle[radius=0.25];
+	\draw (E) circle[radius=0.25];
+}
+\def\fone{
+	\draw[color=red,line width=1.4pt]
+		({-2.0000*\c},{-0.6533*\d}) --
+		({-1.0000*\c},{-0.2706*\d}) --
+		({0.0000*\c},{-0.0000*\d}) --
+		({1.0000*\c},{0.2706*\d}) --
+		({2.0000*\c},{0.6533*\d});
+	\draw[->] ({-2.1*\c},0) -- ({2.1*\c},0);
+	\draw[->] (0,{-1.1*\d}) -- (0,{1.1*\d});
+	\fill ({-2*\c},0) circle[radius=0.05];
+	\fill ({-1*\c},0) circle[radius=0.05];
+	\fill ({0*\c},0) circle[radius=0.05];
+	\fill ({1*\c},0) circle[radius=0.05];
+	\fill ({2*\c},0) circle[radius=0.05];
+}
+\def\vtwo{
+	\coordinate (A) at ({0*\a},0);
+	\coordinate (B) at ({1*\a},0);
+	\coordinate (C) at ({2*\a},0);
+	\coordinate (D) at ({0.5*\a},{-\b});
+	\coordinate (E) at ({1.5*\a},{-\b});
+	\draw (A) -- (B);
+	\draw (A) -- (D);
+	\draw (B) -- (C);
+	\draw (B) -- (D);
+	\draw (B) -- (E);
+	\draw (C) -- (E);
+	\draw (D) -- (E);
+	\node at (-2.8,{-0.5*\b}) [right] {$\lambda=0.3000$};
+	\fill[color=red!100] (A) circle[radius=0.25];
+	\draw (A) circle[radius=0.25];
+	\fill[color=blue!00] (B) circle[radius=0.25];
+	\draw (B) circle[radius=0.25];
+	\fill[color=red!100] (C) circle[radius=0.25];
+	\draw (C) circle[radius=0.25];
+	\fill[color=blue!100] (D) circle[radius=0.25];
+	\draw (D) circle[radius=0.25];
+	\fill[color=blue!100] (E) circle[radius=0.25];
+	\draw (E) circle[radius=0.25];
+}
+\def\ftwo{
+	\draw[color=red,line width=1.4pt]
+		({-2.0000*\c},{0.5000*\d}) --
+		({-1.0000*\c},{-0.5000*\d}) --
+		({0.0000*\c},{-0.0000*\d}) --
+		({1.0000*\c},{-0.5000*\d}) --
+		({2.0000*\c},{0.5000*\d});
+	\draw[->] ({-2.1*\c},0) -- ({2.1*\c},0);
+	\draw[->] (0,{-1.1*\d}) -- (0,{1.1*\d});
+	\fill ({-2*\c},0) circle[radius=0.05];
+	\fill ({-1*\c},0) circle[radius=0.05];
+	\fill ({0*\c},0) circle[radius=0.05];
+	\fill ({1*\c},0) circle[radius=0.05];
+	\fill ({2*\c},0) circle[radius=0.05];
+}
+\def\vthree{
+	\coordinate (A) at ({0*\a},0);
+	\coordinate (B) at ({1*\a},0);
+	\coordinate (C) at ({2*\a},0);
+	\coordinate (D) at ({0.5*\a},{-\b});
+	\coordinate (E) at ({1.5*\a},{-\b});
+	\draw (A) -- (B);
+	\draw (A) -- (D);
+	\draw (B) -- (C);
+	\draw (B) -- (D);
+	\draw (B) -- (E);
+	\draw (C) -- (E);
+	\draw (D) -- (E);
+	\node at (-2.8,{-0.5*\b}) [right] {$\lambda=0.4414$};
+	\fill[color=red!41] (A) circle[radius=0.25];
+	\draw (A) circle[radius=0.25];
+	\fill[color=red!00] (B) circle[radius=0.25];
+	\draw (B) circle[radius=0.25];
+	\fill[color=blue!41] (C) circle[radius=0.25];
+	\draw (C) circle[radius=0.25];
+	\fill[color=blue!100] (D) circle[radius=0.25];
+	\draw (D) circle[radius=0.25];
+	\fill[color=red!100] (E) circle[radius=0.25];
+	\draw (E) circle[radius=0.25];
+}
+\def\fthree{
+	\draw[color=red,line width=1.4pt]
+		({-2.0000*\c},{0.2706*\d}) --
+		({-1.0000*\c},{-0.6533*\d}) --
+		({0.0000*\c},{0.0000*\d}) --
+		({1.0000*\c},{0.6533*\d}) --
+		({2.0000*\c},{-0.2706*\d});
+	\draw[->] ({-2.1*\c},0) -- ({2.1*\c},0);
+	\draw[->] (0,{-1.1*\d}) -- (0,{1.1*\d});
+	\fill ({-2*\c},0) circle[radius=0.05];
+	\fill ({-1*\c},0) circle[radius=0.05];
+	\fill ({0*\c},0) circle[radius=0.05];
+	\fill ({1*\c},0) circle[radius=0.05];
+	\fill ({2*\c},0) circle[radius=0.05];
+}
+\def\vfour{
+	\coordinate (A) at ({0*\a},0);
+	\coordinate (B) at ({1*\a},0);
+	\coordinate (C) at ({2*\a},0);
+	\coordinate (D) at ({0.5*\a},{-\b});
+	\coordinate (E) at ({1.5*\a},{-\b});
+	\draw (A) -- (B);
+	\draw (A) -- (D);
+	\draw (B) -- (C);
+	\draw (B) -- (D);
+	\draw (B) -- (E);
+	\draw (C) -- (E);
+	\draw (D) -- (E);
+	\node at (-2.8,{-0.5*\b}) [right] {$\lambda=0.5000$};
+	\fill[color=red!25] (A) circle[radius=0.25];
+	\draw (A) circle[radius=0.25];
+	\fill[color=blue!100] (B) circle[radius=0.25];
+	\draw (B) circle[radius=0.25];
+	\fill[color=red!25] (C) circle[radius=0.25];
+	\draw (C) circle[radius=0.25];
+	\fill[color=red!25] (D) circle[radius=0.25];
+	\draw (D) circle[radius=0.25];
+	\fill[color=red!25] (E) circle[radius=0.25];
+	\draw (E) circle[radius=0.25];
+}
+\def\ffour{
+	\draw[color=red,line width=1.4pt]
+		({-2.0000*\c},{0.2236*\d}) --
+		({-1.0000*\c},{0.2236*\d}) --
+		({0.0000*\c},{-0.8944*\d}) --
+		({1.0000*\c},{0.2236*\d}) --
+		({2.0000*\c},{0.2236*\d});
+	\draw[->] ({-2.1*\c},0) -- ({2.1*\c},0);
+	\draw[->] (0,{-1.1*\d}) -- (0,{1.1*\d});
+	\fill ({-2*\c},0) circle[radius=0.05];
+	\fill ({-1*\c},0) circle[radius=0.05];
+	\fill ({0*\c},0) circle[radius=0.05];
+	\fill ({1*\c},0) circle[radius=0.05];
+	\fill ({2*\c},0) circle[radius=0.05];
+}
diff --git a/vorlesungen/slides/8/weitere.tex b/vorlesungen/slides/8/weitere.tex
new file mode 100644
index 0000000..46a3da0
--- /dev/null
+++ b/vorlesungen/slides/8/weitere.tex
@@ -0,0 +1,43 @@
+%
+% weitere.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Weitere Resultate der spektralen Graphentheorie}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Satz (Hoffmann)}
+\[
+\operatorname{chr} X \ge 1 + \frac{\alpha_{\text{max}}}{-\alpha_{\text{min}}}
+\]
+\end{block}
+\uncover<2->{%
+\begin{block}{Satz (Hoffmann)}
+\[
+\operatorname{ind} X \le n \biggl(1-\frac{d_{\text{min}}}{\lambda_{\text{max}}}\biggr)
+\]
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<3->{%
+\begin{block}{Korollar}
+Für einen regulären Graphen mit $n$ Knoten gilt
+\begin{align*}
+\operatorname{ind} X
+&\le
+\frac{n}{\displaystyle 1-\frac{d}{\alpha_{\text{min}}}}
+\\
+\operatorname{chr} X
+&\ge
+1-\frac{d}{\alpha_{\text{min}}}
+\end{align*}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/8/wilf.m b/vorlesungen/slides/8/wilf.m
new file mode 100644
index 0000000..49dc161
--- /dev/null
+++ b/vorlesungen/slides/8/wilf.m
@@ -0,0 +1,22 @@
+#
+# wilf.m -- chromatische Zahl für einen Graphen
+#
+# (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+#
+N = 9;
+A = zeros(N,N);
+
+for i = (1:N)
+	j = 1 + rem(i, N)
+	A(i,j) = 1;
+endfor
+for i = (1:3:N-3)
+	j = 1 + rem(i + 2, N)
+	A(i,j) = 1;
+endfor
+
+A(1,3) = 1;
+
+A = A + A'
+
+eig(A)
diff --git a/vorlesungen/slides/9/Makefile.inc b/vorlesungen/slides/9/Makefile.inc
index fa6c29b..2257810 100644
--- a/vorlesungen/slides/9/Makefile.inc
+++ b/vorlesungen/slides/9/Makefile.inc
@@ -10,5 +10,20 @@ chapter9 =								\
 	../slides/9/irreduzibel.tex					\
 	../slides/9/stationaer.tex					\
 	../slides/9/pf.tex						\
+	../slides/9/potenz.tex						\
+	../slides/9/pf/positiv.tex					\
+	../slides/9/pf/primitiv.tex					\
+	../slides/9/pf/trennung.tex					\
+	../slides/9/pf/vergleich.tex					\
+	../slides/9/pf/vergleich3d.tex					\
+	../slides/9/pf/dreieck.tex					\
+	../slides/9/pf/folgerungen.tex					\
+	../slides/9/parrondo/uebersicht.tex				\
+	../slides/9/parrondo/erwartung.tex				\
+	../slides/9/parrondo/spiela.tex					\
+	../slides/9/parrondo/spielb.tex					\
+	../slides/9/parrondo/spielbmod.tex				\
+	../slides/9/parrondo/kombiniert.tex				\
+	../slides/9/parrondo/deformation.tex				\
 	../slides/9/chapter.tex
 
diff --git a/vorlesungen/slides/9/chapter.tex b/vorlesungen/slides/9/chapter.tex
index 9e26587..cbab0f0 100644
--- a/vorlesungen/slides/9/chapter.tex
+++ b/vorlesungen/slides/9/chapter.tex
@@ -10,5 +10,21 @@
 \folie{9/stationaer.tex}
 \folie{9/irreduzibel.tex}
 \folie{9/pf.tex}
+\folie{9/potenz.tex}
 
+\folie{9/pf/positiv.tex}
+\folie{9/pf/primitiv.tex}
+\folie{9/pf/trennung.tex}
+\folie{9/pf/vergleich.tex}
+\folie{9/pf/vergleich3d.tex}
+\folie{9/pf/dreieck.tex}
+\folie{9/pf/folgerungen.tex}
+
+\folie{9/parrondo/uebersicht.tex}
+\folie{9/parrondo/erwartung.tex}
+\folie{9/parrondo/spiela.tex}
+\folie{9/parrondo/spielb.tex}
+\folie{9/parrondo/spielbmod.tex}
+\folie{9/parrondo/kombiniert.tex}
+\folie{9/parrondo/deformation.tex}
 
diff --git a/vorlesungen/slides/9/parrondo/deformation.tex b/vorlesungen/slides/9/parrondo/deformation.tex
new file mode 100644
index 0000000..40d2eb9
--- /dev/null
+++ b/vorlesungen/slides/9/parrondo/deformation.tex
@@ -0,0 +1,45 @@
+%
+% deformation.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Deformation}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Verlustspiele}
+Durch Deformation (Parameter $e$ und $\varepsilon$) kann man
+aus $A_e$ und $B_\varepsilon$ Spiele mit negativer Gewinnerwartung machen
+\uncover<2->{%
+\begin{align*}
+E(X)&=0&&\rightarrow&E(X_e)&<0\\
+E(Y)&=0&&\rightarrow&E(Y_\varepsilon)&<0\\
+\end{align*}}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\begin{block}{Kombiniertes Spiel}
+\uncover<3->{%
+Die Deformation für das Spiel $C$ startet mit Erwartungswert $\frac{18}{709}$}%
+\begin{align*}
+\uncover<4->{E(Z)&=\frac{18}{709}>0}
+&&\uncover<5->{\rightarrow&
+E(Z_*)&>0}
+\end{align*}
+\uncover<6->{Wegen Stetigkeit!}
+\\
+\uncover<5->{Die Deformation ist immer noch ein Gewinnspiel (für Parameter klein genug)}
+\end{block}
+\uncover<7->{%
+\begin{block}{Parrondo-Paradoxon}
+Zufällig zwischen zwei Verlustspielen auswählen kann trotzdem ein
+Gewinnspiel ergeben
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/9/parrondo/erwartung.tex b/vorlesungen/slides/9/parrondo/erwartung.tex
new file mode 100644
index 0000000..b58c37f
--- /dev/null
+++ b/vorlesungen/slides/9/parrondo/erwartung.tex
@@ -0,0 +1,81 @@
+%
+% erwartung.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Erwartung}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Zufallsvariable}
+\begin{center}
+\[
+\begin{array}{c|c}
+\text{Werte $X$}&\text{Wahrscheinlichkeit $p$}\\
+\hline
+x_1&p_1=P(X=x_1)\\
+x_2&p_2=P(X=x_2)\\
+\vdots&\vdots\\
+x_n&p_n=P(X=x_n)
+\end{array}
+\]
+\end{center}
+\end{block}
+\uncover<4->{%
+\begin{block}{Einervektoren/-matrizen}
+\[
+U=\begin{pmatrix}
+1&1&\dots&1\\
+1&1&\dots&1\\
+\vdots&\vdots&\ddots&\vdots\\
+1&1&\dots&1
+\end{pmatrix}
+\in
+M_{n\times m}(\Bbbk)
+\]
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<2->{%
+\begin{block}{Erwartungswerte}
+\begin{align*}
+E(X)
+&=
+\sum_i x_ip_i
+=
+x^tp
+\uncover<5->{=
+U^t x\odot p}
+\hspace*{3cm}
+\\
+\uncover<2->{E(X^2)
+&=
+\sum_i x_i^2p_i}
+\ifthenelse{\boolean{presentation}}{
+\only<6>{=
+(x\odot x)^tp}}{}
+\uncover<7->{=
+U^t (x\odot x) \odot p}
+\\
+\uncover<3->{E(X^k)
+&=
+\sum_i x_i^kp_i}
+\uncover<8->{=
+U^t x^{\odot k}\odot p}
+\end{align*}
+\uncover<9->{%
+Substitution:
+\begin{align*}
+\uncover<10->{\sum_i &\to U^t}\\
+\uncover<11->{x_i^k &\to x^{\odot k}}
+\end{align*}}%
+\uncover<12->{Kann für Übergangsmatrizen von Markov-Ketten verallgemeinert werden}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/9/parrondo/kombiniert.tex b/vorlesungen/slides/9/parrondo/kombiniert.tex
new file mode 100644
index 0000000..5012d06
--- /dev/null
+++ b/vorlesungen/slides/9/parrondo/kombiniert.tex
@@ -0,0 +1,73 @@
+%
+% kombiniert.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Kombiniertes Spiel $C$}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Definition}
+Ein fairer Münzwurf entscheidet, ob
+Spiel $A$ oder Spiel $B$ gespielt wird
+\end{block}
+\uncover<2->{%
+\begin{block}{Übergangsmatrix}
+Münzwurf $X$
+\begin{align*}
+C
+&=
+P(X=\text{Kopf})\cdot A
++
+P(X=\text{Zahl})\cdot B
+\\
+&\uncover<3->{=
+\begin{pmatrix}
+           0&\frac{3}{8}&\frac{5}{8}\\
+\frac{3}{10}&          0&\frac{3}{8}\\
+\frac{7}{10}&\frac{5}{8}&          0
+\end{pmatrix}}
+\end{align*}
+\end{block}}
+\vspace{-8pt}
+\uncover<4->{%
+\begin{block}{Gewinnerwartung im Einzelspiel}
+\[
+p=\frac13U
+\Rightarrow
+U^t(G\odot C)p
+\uncover<5->{=
+-\frac{1}{30}}
+\]
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<6->{%
+\begin{block}{Iteriertes Spiel}
+\[
+\overline{p}=C\overline{p}
+\quad
+\uncover<7->{\Rightarrow
+\quad
+\overline{p}=\frac{1}{709}\begin{pmatrix}245\\180\\284\end{pmatrix}}
+\]
+\end{block}}
+\uncover<8->{%
+\begin{block}{Gewinnerwartung}
+\begin{align*}
+E(Z)
+&=
+U^t (G\odot C) \overline{p}
+\uncover<9->{=
+\frac{18}{709}}
+\end{align*}
+\uncover<10->{$C$ ist ein Gewinnspiel!}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/9/parrondo/spiela.tex b/vorlesungen/slides/9/parrondo/spiela.tex
new file mode 100644
index 0000000..629586f
--- /dev/null
+++ b/vorlesungen/slides/9/parrondo/spiela.tex
@@ -0,0 +1,52 @@
+%
+% spiela.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Spiel $A$}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Definition}
+Gewinn = Zufallsvariable $X$ mit Werten $\pm 1$
+\begin{align*}
+P(X=\phantom{+}1)
+&=
+\frac12\uncover<2->{+e}
+\\
+P(X=         - 1)
+&=
+\frac12\uncover<2->{-e}
+\end{align*}
+Bernoulli-Experiment mit $p=\frac12\uncover<2->{+e}$
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<3->{
+\begin{block}{Gewinnerwartung}
+\begin{align*}
+E(X)
+&=\uncover<4->{
+P(X=1)\cdot (1)}
+\\
+&\qquad
+\uncover<4->{+
+P(X=-1)\cdot (-1)}
+\\
+&\uncover<5->{=
+\biggl(\frac12+e\biggr)\cdot 1
++
+\biggl(\frac12-e\biggr)\cdot (-1)}
+\\
+&\uncover<6->{=2e}
+\end{align*}
+\uncover<7->{$\Rightarrow$ {\usebeamercolor[fg]{title}Verlustspiel für $e<0$}}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/9/parrondo/spielb.tex b/vorlesungen/slides/9/parrondo/spielb.tex
new file mode 100644
index 0000000..f65564f
--- /dev/null
+++ b/vorlesungen/slides/9/parrondo/spielb.tex
@@ -0,0 +1,100 @@
+%
+% spielb.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Spiel $B$}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Definition}
+Gewinn $\pm 1$, Wahrscheinlichkeit abhängig vom 3er-Rest des
+aktuellen Kapitals $K$:
+\begin{center}
+\uncover<2->{%
+\begin{tikzpicture}[>=latex,thick]
+\coordinate (A0) at (90:2);
+\coordinate (A1) at (210:2);
+\coordinate (A2) at (330:2);
+
+\node at (A0) {$0$};
+\node at (A1) {$1$};
+\node at (A2) {$2$};
+
+\draw (A0) circle[radius=0.4];
+\draw (A1) circle[radius=0.4];
+\draw (A2) circle[radius=0.4];
+
+\draw[->,shorten >= 0.4cm,shorten <= 0.4cm] (A0) -- (A1);
+\draw[->,shorten >= 0.4cm,shorten <= 0.4cm] (A0) -- (A2);
+\draw[->,shorten >= 0.4cm,shorten <= 0.4cm] (A1) -- (A2);
+
+\draw[->,shorten >= 0.4cm,shorten <= 0.4cm] (A1) to[out=90,in=-150] (A0);
+\draw[->,shorten >= 0.4cm,shorten <= 0.4cm] (A2) to[out=90,in=-30] (A0);
+\draw[->,shorten >= 0.4cm,shorten <= 0.4cm] (A2) to[out=-150,in=-30] (A1);
+
+\def\R{1.9}
+\def\r{0.7}
+
+\node at (30:\r) {$\frac{9}{10}$};
+\node at (150:\r) {$\frac1{10}$};
+\node at (270:\r) {$\frac34$};
+
+\node at (30:\R) {$\frac{3}{4}$};
+\node at (150:\R) {$\frac1{4}$};
+\node at (270:\R) {$\frac14$};
+
+\end{tikzpicture}}
+\end{center}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<3->{%
+\begin{block}{Markov-Kette $Y$}
+Übergangsmatrix
+\[
+B=\begin{pmatrix}
+0&\frac14&\frac34\\
+\frac{1}{10}&0&\frac14\\
+\frac{9}{10}&\frac34&0
+\end{pmatrix}
+\]
+\vspace{-10pt}
+
+\uncover<4->{%
+Gewinnmatrix:
+\vspace{-2pt}
+\[
+G=\begin{pmatrix*}[r]
+0&-1&1\\
+1&0&-1\\
+-1&1&0
+\end{pmatrix*}
+\]}
+\end{block}}
+\vspace{-12pt}
+\uncover<5->{%
+\begin{block}{Gewinnerwartung}
+\begin{align*}
+&&&&
+E(Y)
+&=
+U^t(G\odot B)p
+\\
+p&={\textstyle\frac13}U
+&&\Rightarrow&
+E(Y)&={\textstyle\frac1{15}}
+\\
+\overline{p}&={\tiny\frac{1}{13}\begin{pmatrix}5\\2\\6\end{pmatrix}}
+&&\Rightarrow&
+E(Y)&=0
+\end{align*}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/9/parrondo/spielbmod.tex b/vorlesungen/slides/9/parrondo/spielbmod.tex
new file mode 100644
index 0000000..66d39bc
--- /dev/null
+++ b/vorlesungen/slides/9/parrondo/spielbmod.tex
@@ -0,0 +1,103 @@
+%
+% spielb.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Modifiziertes Spiel $\tilde{B}$}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Definition}
+Gewinn $\pm 1$, Wahrscheinlichkeit abhängig vom 3er-Rest des
+aktuellen Kapitals $K$:
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+\coordinate (A0) at (90:2);
+\coordinate (A1) at (210:2);
+\coordinate (A2) at (330:2);
+
+\node at (A0) {$0$};
+\node at (A1) {$1$};
+\node at (A2) {$2$};
+
+\draw (A0) circle[radius=0.4];
+\draw (A1) circle[radius=0.4];
+\draw (A2) circle[radius=0.4];
+
+\draw[->,shorten >= 0.4cm,shorten <= 0.4cm] (A0) -- (A1);
+\draw[->,shorten >= 0.4cm,shorten <= 0.4cm] (A0) -- (A2);
+\draw[->,shorten >= 0.4cm,shorten <= 0.4cm] (A1) -- (A2);
+
+\draw[->,shorten >= 0.4cm,shorten <= 0.4cm] (A1) to[out=90,in=-150] (A0);
+\draw[->,shorten >= 0.4cm,shorten <= 0.4cm] (A2) to[out=90,in=-30] (A0);
+\draw[->,shorten >= 0.4cm,shorten <= 0.4cm] (A2) to[out=-150,in=-30] (A1);
+
+\def\R{1.9}
+\def\r{0.7}
+
+\node at (30:{0.9*\r}) {\tiny $\frac{9}{10}\uncover<2->{+\varepsilon}$};
+\node at (150:{0.9*\r}) {\tiny $\frac1{10}\uncover<2->{-\varepsilon}$};
+\node at (270:\r) {$\frac34\uncover<2->{-\varepsilon}$};
+
+\node at (30:{1.1*\R}) {$\frac{3}{4}\uncover<2->{-\varepsilon}$};
+\node at (150:{1.1*\R}) {$\frac1{4}\uncover<2->{+\varepsilon}$};
+\node at (270:\R) {$\frac14\uncover<2->{+\varepsilon}$};
+
+\end{tikzpicture}
+\end{center}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\begin{block}{Markov-Kette $\tilde{Y}$}
+Übergangsmatrix
+\[
+\tilde{B}=
+B\uncover<2->{+\varepsilon F}
+\uncover<3->{=
+B+\varepsilon\begin{pmatrix*}[r]
+0&1&-1\\
+-1&0&1\\
+1&-1&0
+\end{pmatrix*}}
+\]
+\vspace{-12pt}
+
+\uncover<4->{%
+Gewinnmatrix:
+\[
+G=\begin{pmatrix*}[r]
+0&-1&1\\
+1&0&-1\\
+-1&1&0
+\end{pmatrix*}
+\]}
+\end{block}
+\vspace{-12pt}
+\uncover<5->{%
+\begin{block}{Gewinnerwartung}
+\begin{align*}
+\uncover<6->{E(\tilde{Y})
+&=
+U^t(G\odot \tilde{B})p}
+\\
+&\uncover<7->{=
+E(Y) + \varepsilon U^t(G\odot F)p}
+\uncover<8->{=
+{\textstyle\frac1{15}}+2\varepsilon}
+\\
+\uncover<9->{
+\text{rep.}
+&=
+-{\textstyle\frac{294}{169}}\varepsilon+O(\varepsilon^2)
+\quad\text{Verlustspiel}
+}
+\end{align*}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/9/parrondo/uebersicht.tex b/vorlesungen/slides/9/parrondo/uebersicht.tex
new file mode 100644
index 0000000..2f3597a
--- /dev/null
+++ b/vorlesungen/slides/9/parrondo/uebersicht.tex
@@ -0,0 +1,17 @@
+%
+% uebersicht.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Parrondo-Paradoxon}
+\begin{center}
+\Large
+Zufällige
+Wahl zwischen zwei Verlustspielen = Gewinnspiel?
+\end{center}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/9/pf/dreieck.tex b/vorlesungen/slides/9/pf/dreieck.tex
new file mode 100644
index 0000000..0a572f3
--- /dev/null
+++ b/vorlesungen/slides/9/pf/dreieck.tex
@@ -0,0 +1,44 @@
+%
+% dreieck.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Verallgemeinerte Dreiecksungleichung}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.32\textwidth}
+\begin{block}{Satz}
+\[
+|u+v|\le |u|+|v|
+\]
+Gleichheit wenn lin.~abh.
+\end{block}
+\begin{block}{Satz}
+\[
+\biggl|\sum_i u_i\biggr|
+\le
+\sum_i |u_i|
+\]
+Gleichheit wenn $u_i = \lambda_i u$
+\end{block}
+\begin{block}{Satz}
+\[
+\biggl|\sum_i z_i\biggr|
+\le
+\sum_i |z_i|
+\]
+Gleichheit, wenn $z_i=|z_i|c$, $c\in\mathbb{C}$
+\end{block}
+\end{column}
+\begin{column}{0.68\textwidth}
+\begin{center}
+\includegraphics[width=\textwidth]{../../buch/chapters/80-wahrscheinlichkeit/images/dreieck.pdf}
+\end{center}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/9/pf/folgerungen.tex b/vorlesungen/slides/9/pf/folgerungen.tex
new file mode 100644
index 0000000..5042c78
--- /dev/null
+++ b/vorlesungen/slides/9/pf/folgerungen.tex
@@ -0,0 +1,203 @@
+%
+% template.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Folgerungen für $A>0$}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Satz}
+$u\ge 0$ ein EV zum EW $ \lambda\ne 0$,
+dann ist $u>0$ und $\lambda >0$
+\end{block}
+\uncover<6->{%
+\begin{block}{Satz}
+$v$ ein EV zum EW $\lambda$ mit $|\lambda| = \varrho(A)$,
+dann ist $u=|v|$ mit $u_i=|v_i|$ ein EV mit EW $\varrho(A)$
+\end{block}}
+\uncover<29->{%
+\begin{block}{Satz}
+$v$ ein EV zum EW $\lambda$ mit $|\lambda|=\varrho(A)$,
+dann ist $\lambda=\varrho(A)$
+\end{block}}
+\uncover<46->{%
+\begin{block}{Satz}
+Der \only<57->{verallgemeinerte }Eigenraum zu EW $\varrho(A)$
+ist eindimensional
+\end{block}
+}
+\end{column}
+\ifthenelse{\boolean{presentation}}{
+\only<-6>{
+\begin{column}{0.48\textwidth}
+\begin{proof}[Beweis]
+\begin{itemize}
+\item<3->
+Vergleich: $Au>0$
+\item<4->
+$Au=\lambda u > 0$
+\item<5->
+$\lambda >0$ und $u>0$
+\end{itemize}
+\end{proof}
+\end{column}}
+\only<7-20>{
+\begin{column}{0.48\textwidth}
+\begin{proof}[Beweis]
+\begin{align*}
+(Au)_i
+&\only<-8>{=
+\sum_j a_{ij}u_j}
+\only<8-9>{=
+\sum_j |a_{ij}v_j|}
+\only<9->{\ge}
+\only<9-10>{
+\biggl|\sum_j a_{ij}v_j\biggr|}
+\only<10>{=}
+\only<10-11>{
+|(Av)_i|}
+\only<11>{=}
+\only<11-12>{
+|\lambda v_i|}
+\only<12>{=}
+\only<12-13>{
+\varrho(A) |v_i|}
+\only<13>{=}
+\uncover<13->{
+\varrho(A) u_i}
+\hspace*{5cm}
+\\
+\uncover<14->{Au&\ge \varrho(A)u}
+\intertext{\uncover<15->{Vergleich}}
+\uncover<16->{A^2u&> \varrho(A)Au}
+\intertext{\uncover<17->{Trennung: $\exists \vartheta >1$ mit}}
+\uncover<18->{A^2u&\ge \vartheta \varrho(A) Au }\\
+\uncover<19->{A^3u&\ge (\vartheta \varrho(A))^2 Au }\\
+\uncover<20->{A^ku&\ge (\vartheta \varrho(A))^{k-1} Au }\\
+\end{align*}
+\end{proof}
+\end{column}}
+\only<21-29>{%
+\begin{column}{0.48\textwidth}
+\begin{proof}[Beweis, Fortsetzung]
+Abschätzung der Operatornorm:
+\begin{align*}
+\|A^k\|\, |Au|
+\ge
+\|A^{k+1}u\|
+\uncover<22->{
+\ge
+(\vartheta\varrho(A))^k |Au|}
+\end{align*}
+\uncover<23->{Abschätzung des Spektralradius}
+\begin{align*}
+\uncover<24->{\|A^k\| &\ge (\vartheta\varrho(A))^k}
+\\
+\uncover<25->{\|A^k\|^{\frac1k} &\ge \vartheta \varrho(A)}
+\\
+\uncover<26->{\lim_{k\to\infty}\|A^k\|^{\frac1k} &\ge \vartheta \varrho(A)}
+\\
+\uncover<27->{\varrho(A) &\ge \underbrace{\vartheta}_{>1} \varrho(A)}
+\end{align*}
+\uncover<28->{Widerspruch: $u=v$}
+\end{proof}
+\end{column}}
+\only<30-46>{
+\begin{column}{0.48\textwidth}
+\begin{proof}[Beweis]
+$u$ ist EV mit EW $\varrho(A)$:
+\[
+Au=\varrho(A)u
+\uncover<31->{\Rightarrow
+\sum_j a_{ij}|v_j| = {\color<38->{red}\varrho(A) |v_i|}}
+\]
+\uncover<33->{Andererseits: $Av=\lambda v$}
+\[
+\uncover<34->{\sum_{j}a_{ij}v_j=\lambda v_i}
+\]
+\uncover<35->{Betrag}
+\begin{align*}
+\uncover<36->{\biggl|\sum_j a_{ij}v_j\biggr|
+&=
+|\lambda v_i|}
+\uncover<37->{=
+{\color<38->{red}\varrho(A) |v_i|}}
+\uncover<39->{=
+\sum_j a_{ij}|v_j|}
+\end{align*}
+\uncover<40->{Dreiecksungleichung: $v_j=|v_j|c, c\in\mathbb{C}$}
+\[
+\uncover<41->{\lambda v = Av}
+\uncover<42->{= Acu}
+\uncover<43->{= c\varrho(A) u}
+\uncover<44->{= \varrho(A)v}
+\]
+\uncover<45->{$\Rightarrow
+\lambda=\varrho(A)
+$}
+\end{proof}
+\end{column}}
+\only<47-57>{
+\begin{column}{0.48\textwidth}
+\begin{proof}[Beweis]
+\begin{itemize}
+\item<48-> $u>0$ ein EV zum EW $\varrho(A)$
+\item<49-> $v$ ein weiterer EV, man darf $v\in\mathbb{R}^n$ annehmen
+\item<50-> Da $u>0$ gibt es $c>0$ mit $u\ge cv$ aber $u\not > cv$
+\item<51-> $u-cv\ge 0$ aber $u-cv\not > 0$
+\item<52-> $A$ anwenden:
+\[
+\begin{array}{ccc}
+\uncover<53->{A(u-cv)}&\uncover<54->{>&0}
+\\
+\uncover<53->{\|}&&
+\\
+\uncover<53->{\varrho(A)(u-cv)}&\uncover<55->{\not>&0}
+\end{array}
+\]
+\uncover<56->{Widerspruch: $v$ existiert nicht}
+\end{itemize}
+\end{proof}
+\end{column}}
+\only<58->{
+\begin{column}{0.48\textwidth}
+\begin{proof}[Beweis]
+\begin{itemize}
+\item<59-> $Au=\varrho(A)u$ und $A^tp^t=\varrho(A)p^t$
+\item<60-> $u>0$ und $p>0$ $\Rightarrow$ $up>0$
+\item<61-> $px=0$, dann ist
+\[
+\uncover<62->{pAx}
+\only<62-63>{=
+(A^tp^t)^t x}
+\only<63-64>{=
+\varrho(A) (p^t)^t x}
+\uncover<64->{=
+\varrho(A) px}
+\uncover<65->{= 0}
+\]
+\uncover<66->{also ist $\{x\in\mathbb{R}^n\;|\; px=0\}$
+invariant}
+\item<67-> Annahme: $v\in \mathcal{E}_{\varrho(A)}$
+\item<68-> Dann muss es einen EV zum EW $\varrho(A)$ in 
+$\mathcal{E}_{\varrho(A)}$ geben
+\item<69-> Widerspruch: der Eigenraum ist eindimensional
+\end{itemize}
+\end{proof}
+\end{column}}
+}{
+\begin{column}{0.48\textwidth}
+\begin{block}{}
+\usebeamercolor[fg]{title}
+Beweise: Buch Abschnitt 9.3 
+\end{block}
+\end{column}
+}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/9/pf/positiv.tex b/vorlesungen/slides/9/pf/positiv.tex
new file mode 100644
index 0000000..d7e833d
--- /dev/null
+++ b/vorlesungen/slides/9/pf/positiv.tex
@@ -0,0 +1,64 @@
+%
+% positiv.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Positive und nichtnegative Matrizen}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Positive Matrix\strut}
+Eine Matrix $A$ heisst positiv, wenn
+\[
+a_{ij} > 0\quad\forall i,j
+\]
+Man schreibt $A>0\mathstrut$
+\end{block}
+\uncover<2->{%
+\begin{block}{Relation $>\mathstrut$}
+Man schreibt $A>B$ wenn $A-B > 0\mathstrut$
+\end{block}}
+\uncover<5->{%
+\begin{block}{Wahrscheinlichkeitsmatrix}
+\[
+W=\begin{pmatrix}
+0.7&0.2&0.1\\
+0.2&0.6&0.1\\
+0.1&0.2&0.8
+\end{pmatrix}
+\]
+Spaltensumme$\mathstrut=1$, Zeilensumme$\mathstrut=?$
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<3->{%
+\begin{block}{Nichtnegative Matrix\strut}
+Eine Matrix $A$ heisst nichtnegativ, wenn
+\[
+a_{ij} \ge 0\quad\forall i,j
+\]
+Man schreibt $A\ge 0\mathstrut$
+\end{block}}
+\uncover<4->{%
+\begin{block}{Relation $\ge\mathstrut$}
+Man schreibt $A\ge B$ wenn $A-B \ge 0\mathstrut$
+\end{block}}
+\uncover<6->{%
+\begin{block}{Permutationsmatrix}
+\[
+P=\begin{pmatrix}
+0&0&1\\
+1&0&0\\
+0&1&0
+\end{pmatrix}
+\]
+Genau eine $1$ in jeder Zeile/Spalte
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/9/pf/primitiv.tex b/vorlesungen/slides/9/pf/primitiv.tex
new file mode 100644
index 0000000..961b1d5
--- /dev/null
+++ b/vorlesungen/slides/9/pf/primitiv.tex
@@ -0,0 +1,84 @@
+%
+% primitiv.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Primitive Matrix}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Definition}
+$A\ge 0$ heisst primitiv, wenn es ein $n>0$ gibt mit $A^n>0$
+\end{block}
+\uncover<9->{%
+\begin{block}{Intuition}
+\begin{itemize}
+\item<10->
+Markov-Ketten: $a_{ij} > 0$ bedeutet, $i$ von $j$ aus erreichbar.
+\item<11->
+Band: {\em alle} Verbindung mit allen Nachbarn
+\item<12->
+$n$-te Potenz: Pfade der Länge $n$ 
+\item<13->
+Durchmesser: wenn $n>\text{Durchmesser des Zustandsdiagramms}$,
+dann ist $A^n>0$
+\end{itemize}
+\end{block}
+}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<2->{%
+\begin{block}{Beispiel: Reduzible W'keitsmatrix}
+\vspace{-5pt}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+\fill[color=gray!40] (-1,0) rectangle (0,1);
+\fill[color=gray!40] (0,-1) rectangle (1,0);
+\draw[line width=0.3pt] (0,-1) -- (0,1);
+\draw[line width=0.3pt] (-1,0) -- (1,0);
+%\draw (-1,-1) rectangle (1,1);
+\node at (0,0) {$\left( \raisebox{0pt}[1cm][1cm]{\hspace*{2cm}} \right)$};
+\node at (-1.3,0) [left] {$\mathstrut W=$};
+\node at (0.5,0.5) {$0$};
+\node at (-0.5,-0.5) {$0$};
+\end{tikzpicture}
+\end{center}
+\vspace{-10pt}
+
+$\Rightarrow$ $W$ ist nicht primitiv
+\end{block}}
+\uncover<3->{%
+\begin{block}{Beispiel: Bandmatrix}
+\centering
+\begin{tikzpicture}[>=latex,thick]
+\begin{scope}
+\clip (-1,-1) rectangle (1,1);
+\foreach \n in {3,...,8}{
+	\pgfmathparse{0.3*(\n-2)}
+	\xdef\x{\pgfmathresult}
+	\only<\n>{
+		\fill[color=gray!40]
+			({-1.2-\x},1) -- (1,{-1.2-\x}) -- (1,{-0.8+\x})
+			-- ({-0.8+\x},1) -- cycle;
+	}
+}
+\fill[color=gray] (-1.2,1) -- (1,-1.2) -- (1,-0.8) -- (-0.8,1) -- cycle;
+\end{scope}
+\foreach \n in {2,...,8}{
+	\uncover<\n>{
+		\pgfmathparse{int(\n-2)}
+		\xdef\k{\pgfmathresult}
+		\node at (-1.3,0) [left] {$\mathstrut B^{\k}=$};
+	}
+}
+\node at (0,0) {$\left( \raisebox{0pt}[1cm][1cm]{\hspace*{2cm}} \right)$};
+\end{tikzpicture}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/9/pf/trennung.tex b/vorlesungen/slides/9/pf/trennung.tex
new file mode 100644
index 0000000..9c85849
--- /dev/null
+++ b/vorlesungen/slides/9/pf/trennung.tex
@@ -0,0 +1,99 @@
+%
+% trennung.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\definecolor{darkgreen}{rgb}{0,0.6,0}
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Trennung}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+
+\coordinate (u) at (3.5,4.5);
+\coordinate (v) at (2.5,2);
+\coordinate (va) at ({(3.5/2.5)*2.5},{(3.5/2.5)*2});
+
+\uncover<3->{
+\fill[color=darkgreen!20] (0,0) rectangle (5.3,5.3);
+\node[color=darkgreen] at (1.5,4.9) {$u\not\ge w$};
+\node[color=darkgreen] at (4.4,0.6) {$u\not\ge w$};
+}
+
+\uncover<5->{
+\begin{scope}
+\clip (0,0) rectangle (5.3,5.3);
+\draw[color=darkgreen] (0,0) -- ($3*(v)$);
+\end{scope}
+
+\node[color=darkgreen] at ($1.2*(va)$)
+	[below,rotate={atan(2/2.5)}] {$(1+\mu)v$};
+}
+
+\uncover<2->{
+	\fill[color=red!20] (0,0) rectangle (u);
+}
+
+\fill[color=red] (u) circle[radius=0.08];
+\node[color=red] at (u) [above right] {$u$};
+
+\uncover<4->{
+	\fill[color=blue!40,opacity=0.5] (0,0) rectangle (v);
+}
+
+\uncover<2->{
+	\fill[color=blue] (v) circle[radius=0.08];
+	\node[color=blue] at (v) [above] {$v$};
+}
+
+\uncover<4->{
+	\draw[color=blue] (0,0) -- (va);
+
+	\fill[color=blue] (va) circle[radius=0.08];
+	\node[color=blue] at (va) [above left] {$(1+\varepsilon)v$};
+}
+
+\draw[->] (-0.1,0) -- (5.5,0) coordinate[label={$x_1$}];
+\draw[->] (0,-0.1) -- (0,5.5) coordinate[label={right:$x_2$}];
+
+\uncover<2->{
+	\draw[->,color=red] (3.0,-0.2) -- (3.0,1.5);
+	\node[color=red] at (3.0,-0.2) [below]
+		{$\{w\in\mathbb{R}^n\;|\; w<u\}$};
+}
+
+\end{tikzpicture}
+\end{center}
+\end{column}
+\begin{column}{0.48\textwidth}
+\begin{block}{Satz}
+$u>v\ge 0$\uncover<4->{, dann gibt es $\varepsilon>0$ mit
+\[
+u\ge (1+\varepsilon)v
+\]}%
+\uncover<5->{und für $\mu>\varepsilon$ ist 
+\[
+u \not\ge (1+\mu)v 
+\]}
+\uncover<6->{%
+\begin{proof}[Beweis]
+\begin{itemize}
+\item<7->
+$u>v$ $\Rightarrow$ $u_i/v_i>1$ falls $v_i>0$
+\item<8->
+\[
+\vartheta = \min_{v_i\ne 0} \frac{u_i}{v_i} > 1
+\]
+\uncover<9->{$\varepsilon = \vartheta - 1$}
+\end{itemize}
+\end{proof}}
+\end{block}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/9/pf/vergleich.tex b/vorlesungen/slides/9/pf/vergleich.tex
new file mode 100644
index 0000000..c1a1f7a
--- /dev/null
+++ b/vorlesungen/slides/9/pf/vergleich.tex
@@ -0,0 +1,113 @@
+%
+% vergleich.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\definecolor{darkgreen}{rgb}{0,0.6,0}
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Vergleich}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+
+\def\a{1.2}    \def\b{0.35}
+\def\c{0.5}    \def\d{1.25}
+\def\r{4}
+
+\coordinate (u) at (3.5,0);
+\coordinate (v) at (2.5,0);
+
+\coordinate (Au) at ({3.5*\a},{3.5*\c});
+\coordinate (Av) at ({2.5*\a},{2.5*\c});
+
+\uncover<2->{
+	\begin{scope}
+	\clip (0,0) rectangle (5,5);
+	\fill[color=red!20] (0,0) circle[radius=4];
+	\end{scope}
+	\node[color=red] at (0,4) [below right] {$\mathbb{R}^n$};
+
+	\fill[color=blue!40,opacity=0.5] (0,0) -- ({\a*\r},{\c*\r})
+		-- plot[domain=0:90,samples=100]
+		({\r*(\a*cos(\x)+\b*sin(\x))},{\r*(\c*cos(\x)+\d*sin(\x))})
+		-- ({\b*\r},{\d*\r}) -- cycle;
+	\node[color=blue] at ({\r*\b},{\r*\d}) [below right] {$A\mathbb{R}^n$};
+}
+
+\draw[->] (-0.1,0) -- (5.5,0) coordinate[label={$x_1$}];
+\draw[->] (0,-0.1) -- (0,5.5) coordinate[label={right:$x_2$}];
+
+\uncover<3->{
+	\fill[color=darkgreen!30,opacity=0.5]
+		(0,0) rectangle ({3.5*\a},{3.5*\c});
+	\draw[color=white,line width=0.7pt]
+		({3.5*\a},0) -- ({3.5*\a},{3.5*\c}) -- (0,{3.5*\c});
+}
+
+\uncover<2->{
+	\draw[->,color=blue,line width=1.4pt] (0,0) -- ({\r*\a},{\r*\c});
+	\draw[->,color=blue,line width=1.4pt] (0,0) -- ({\r*\b},{\r*\d});
+
+	\draw[->,color=red,line width=1.4pt] (0,0) -- (4,0);
+	\draw[->,color=red,line width=1.4pt] (0,0) -- (0,4);
+}
+
+\draw[color=darkgreen,line width=2pt] (u) -- (v);
+\fill[color=darkgreen] (u) circle[radius=0.08];
+\fill[color=darkgreen] (v) circle[radius=0.08];
+
+\node[color=darkgreen] at (u) [below right] {$u$};
+\node[color=darkgreen] at (v) [below left] {$v$};
+\node[color=darkgreen] at ($0.5*(u)+0.5*(v)$) [above] {$v\le u$};
+
+\uncover<3->{
+	\draw[color=darkgreen,line width=2pt] (Au) -- (Av);
+	\fill[color=darkgreen] (Au) circle[radius=0.08];
+	\fill[color=darkgreen] (Av) circle[radius=0.08];
+
+	\node[color=darkgreen] at (Au) [above left] {$Au$};
+	\node[color=darkgreen] at (Av) [above left] {$Av$};
+
+	\node[color=darkgreen] at ($0.5*(Au)+0.5*(Av)$)
+		[below,rotate={atan(\c/\a)}] {$Av<Au$};
+}
+
+\end{tikzpicture}
+\end{center}
+\end{column}
+\begin{column}{0.48\textwidth}
+\begin{block}{Satz}
+$u\ge v\ge 0$ \uncover<2->{und $A > 0$}\uncover<3->{ $\Rightarrow$ $Au>Av$}
+\end{block}
+\uncover<4->{%
+\begin{block}{intuitiv}
+$A>0$ befördert $\ge$ zu $>$
+\end{block}}
+\uncover<5->{%
+\begin{proof}[Beweis]
+$d=u-v\ge 0$
+\begin{align*}
+(Ad)_i
+\uncover<6->{=
+\sum_{j}
+\underbrace{a_{ij}}_{>0}d_j}
+\uncover<7->{>
+0}
+\uncover<8->{\quad\Rightarrow\quad
+Au > Av}
+\end{align*}
+\uncover<7->{da mindestens ein $d_j>0$ ist}
+\end{proof}}
+\uncover<9->{%
+\begin{block}{Korollar}
+$A>0$ und $d\ge 0$ $\Rightarrow$ $Ad > 0$
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/9/pf/vergleich3d.tex b/vorlesungen/slides/9/pf/vergleich3d.tex
new file mode 100644
index 0000000..1c019a6
--- /dev/null
+++ b/vorlesungen/slides/9/pf/vergleich3d.tex
@@ -0,0 +1,26 @@
+%
+% template.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Vergleich}
+
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.57\textwidth}
+\begin{center}
+\includegraphics[width=\textwidth]{../../buch/chapters/80-wahrscheinlichkeit/images/vergleich.pdf}
+\end{center}
+\end{column}
+\begin{column}{0.38\textwidth}
+\begin{block}{Satz}
+$u\ge v\ge 0$ $\Rightarrow$ $Au>Av$
+\end{block}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/9/potenz.tex b/vorlesungen/slides/9/potenz.tex
new file mode 100644
index 0000000..2c3afa3
--- /dev/null
+++ b/vorlesungen/slides/9/potenz.tex
@@ -0,0 +1,15 @@
+%
+% potenz.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Potenzmethode}
+\begin{center}
+\includegraphics[width=0.9\textwidth]{../../buch/chapters/80-wahrscheinlichkeit/images/positiv.pdf}
+\end{center}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/test.tex b/vorlesungen/slides/test.tex
index 17c8a28..4289c44 100644
--- a/vorlesungen/slides/test.tex
+++ b/vorlesungen/slides/test.tex
@@ -3,9 +3,26 @@
 %
 % (c) 2021 Prof Dr Andreas Müller, Hochschule Rapperswil
 %
-\folie{7/mannigfaltigkeit.tex}
-\folie{7/haar.tex}
-\folie{7/quaternionen.tex}
-\folie{7/qdreh.tex}
-\folie{7/ueberlagerung.tex}
-\folie{7/hopf.tex}
+%\folie{9/google.tex}
+%\folie{9/markov.tex}
+%\folie{9/stationaer.tex}
+%\folie{9/irreduzibel.tex}
+%\folie{9/pf.tex}
+
+%\folie{9/pf/positiv.tex}
+%\folie{9/pf/primitiv.tex}
+%\folie{9/pf/trennung.tex}
+%\folie{9/pf/vergleich.tex}
+%\folie{9/pf/vergleich3d.tex}
+%\folie{9/pf/dreieck.tex}
+%\folie{9/pf/folgerungen.tex}
+%\folie{9/potenz.tex}
+
+\folie{9/parrondo/erwartung.tex}
+%\folie{9/parrondo/uebersicht.tex}
+\folie{9/parrondo/spiela.tex}
+\folie{9/parrondo/spielb.tex}
+\folie{9/parrondo/spielbmod.tex}
+\folie{9/parrondo/kombiniert.tex}
+\folie{9/parrondo/deformation.tex}
+