Merge branch 'master' of https://github.com/AndreasFMueller/SeminarMatrizen

108 files changed, 3096 insertions, 62 deletions

diff --git a/buch/chapters/30-endlichekoerper/euklid.tex b/buch/chapters/30-endlichekoerper/euklid.tex
index db326f8..8aa2f71 100644
--- a/buch/chapters/30-endlichekoerper/euklid.tex
+++ b/buch/chapters/30-endlichekoerper/euklid.tex
@@ -431,6 +431,7 @@ zur Bestimmung des grössten gemeinsamen Teilers von $76415$ und $23205$
 zur Berechnung der Koeffizienten $c_k$ und $d_k$
 Wir schreiben die gefundenen Zahlen in eine Tabelle:
 \begin{center}
+\label{buch:endlichekoerper:beispiel1erweitert}
 \renewcommand{\arraystretch}{1.1}
 \begin{tabular}{|>{$}r<{$}|>{$}r<{$}|>{$}r<{$}|>{$}r<{$}|>{$}r<{$}|>{$}r<{$}>{$}r<{$}|}
 \hline
@@ -614,4 +615,219 @@ Aus den letzten zwei Zeilen folgt
 $ua-vb = ab/g - ab/g = 0$, wie erwartet.
 \end{beispiel}
 
+%
+% Das kleinste gemeinsame Vielfache
+%
+\subsection{Das kleinste gemeinsame Vielfache
+\label{buch:subsection:daskgv}}
+Das kleinste gemeinsame Vielfache zweier Zahlen $a$ und $b$ ist
+\[
+\operatorname{kgV}(a,b)
+=
+\frac{ab}{\operatorname{ggT}(a,b)}.
+\]
+Wir suchen nach einen Algorithmus, mit dem man das kleinste gemeinsame
+Vielfache effizient berechnen kann.
+
+Die Zahlen $a$ und $b$ sind beide Vielfache des grössten gemeinsamen
+Teilers $g=\operatorname{ggT}(a,b)$, es gibt also Zahlen $u$ und $v$ derart,
+dass $a=ug$ und $b=vg$.
+Wenn $t$ ein gemeinsamer Teiler von $u$ und $v$ ist, dann ist $tg$ ein
+grösserer gemeinsamer Teiler von $a$ und $b$.
+Dies kann nicht sein, also müssen $u$ und $v$ teilerfremd sein.
+Das kleinste gemeinsame Vielfache von $a$ und $b$ ist dann $ugv=av=ub$.
+Die Bestimmung des kleinsten gemeinsamen Vielfachen ist also gleichbedeutend
+mit der Bestimmung der Zahlen $u$ und $v$.
+
+Die definierende Eigenschaften von $u$ und $v$ kann man in Matrixform als
+\begin{equation}
+\begin{pmatrix}
+a\\b
+\end{pmatrix}
+=
+\underbrace{
+\begin{pmatrix}
+u&?\\
+v&?
+\end{pmatrix}}_{\displaystyle =K}
+\begin{pmatrix}
+\operatorname{ggT}(a,b)\\ 0
+\end{pmatrix}
+\label{buch:eindlichekoerper:eqn:uvmatrix}
+\end{equation}
+geschrieben werden, wobei wir die Matrixelemente $?$ nicht kennen.
+Diese Elemente müssen wir auch nicht kennen, um $u$ und $v$ zu bestimmen.
+
+Bei der Bestimmung des grössten gemeinsamen Teilers wurde der Vektor auf
+der rechten Seite von~\eqref{buch:eindlichekoerper:eqn:uvmatrix} bereits
+gefunden.
+Die Matrizen $Q(q_i)$, die die einzelne Schritte des euklidischen
+Algorithmus beschreiben, ergeben ihn als
+\[
+\begin{pmatrix}
+\operatorname{ggT}(a,b)\\0
+\end{pmatrix}
+=
+Q(q_n)Q(q_{n-1}) \dots Q(q_1)Q(q_0)
+\begin{pmatrix}a\\b\end{pmatrix}.
+\]
+Indem wir die Matrizen $Q(q_n)$ bis $Q(q_0)$ auf die linke Seite der
+Gleichung schaffen, erhalten wir
+\[
+\begin{pmatrix}a\\b\end{pmatrix}
+=
+Q(q_0)^{-1}
+Q(q_1)^{-1}
+\dots
+Q(q_{n-1})^{-1}
+Q(q_n)
+\begin{pmatrix}\operatorname{ggT}(a,b)\\0\end{pmatrix}.
+\]
+Eine mögliche Lösung für die Matrix $K$ in
+\eqref{buch:eindlichekoerper:eqn:uvmatrix}
+ist der die Matrix
+\[
+K
+=
+Q(q_0)^{-1}
+Q(q_1)^{-1}
+\dots
+Q(q_{n-1})^{-1}
+Q(q_n).
+\]
+Insbesondere ist die Matrix $K$ die Inverse der früher gefundenen
+Matrix $Q$.
+
+Die Berechnung der Matrix $K$ als Inverse von $Q$ ist nicht sehr
+effizient.
+Genauso wie es möglich war, das Produkt $Q$ der Matrizen
+$Q(q_k)$ iterativ zu bestimmen, muss es auch eine Rekursionsformel
+für das Produkt der inversen Matrizen $Q(q_k)^{-1}$ geben.
+
+Schreiben wir die gesuchte Matrix 
+\[
+K_k
+=
+Q(q_0)^{-1}\dots Q(q_{k-1})^{-1}
+=
+\begin{pmatrix}
+e_k & e_{k-1}\\
+f_k & f_{k-1}
+\end{pmatrix},
+\]
+dann kann man $K_k$ durch die Rekursion
+\begin{equation}
+K_{k+1}
+=
+K_{k} Q(q_k)^{-1} 
+=
+K_k K(q_k)
+\qquad\text{mit}\qquad
+K_0 = \begin{pmatrix}1&0\\0&1\end{pmatrix} = I
+\label{buch:endlichekoerper:eqn:kgvrekursion}
+\end{equation}
+berechnen.
+Die Inverse von $Q(q)$ ist
+\[
+K(q)
+=
+Q(q)^{-1}
+=
+\frac{1}{\det Q(q)}
+\begin{pmatrix}
+q&1\\
+1&0
+\end{pmatrix}
+\quad\text{denn}\quad
+K(q)Q(q)
+=
+\begin{pmatrix}
+q&1\\
+1&0
+\end{pmatrix}
+\begin{pmatrix}
+0&1\\
+1&-q
+\end{pmatrix}
+=
+\begin{pmatrix}
+1&0\\
+0&1
+\end{pmatrix}.
+\]
+Da die zweite Spalte von $K(q)$ die erste Spalte einer Einheitsmatrix
+ist, wird die zweite Spalte des Produktes $AK(q)$ immer die erste Spalte
+von $A$ sein.
+In $K_{k+1}$ ist daher nur die erste Spalte neu, die zweite Spalte ist
+die erste Spalte von $K_k$.
+
+Aus der Rekursionsformel \eqref{buch:endlichekoerper:eqn:kgvrekursion}
+für die Matrizen $K_k$ kann man jetzt eine Rekursionsbeziehung
+für die Folgen $e_k$ und $f_k$ ablesen, es gilt
+\begin{align*}
+e_{k+1} &= q_ke_k + e_{k-1} \\
+f_{k+1} &= q_kf_k + f_{k-1}
+\end{align*}
+für $k=0,1,\dots ,n$.
+Damit können $e_k$ und $f_k$ gleichzeitig mit den Zahlen $c_k$ und $d_k$
+in einer Tabelle berechnen.
+
+\begin{beispiel}
+Wir erweitern das Beispiel von
+Seite~\pageref{buch:endlichekoerper:beispiel1erweitert}
+um die beiden Spalten zur Berechnung von $e_k$ und $f_k$:
+\begin{center}
+\renewcommand{\arraystretch}{1.1}
+\begin{tabular}{|>{$}r<{$}|>{$}r<{$}|>{$}r<{$}|>{$}r<{$}|>{$}r<{$}|>{$}r<{$}>{$}r<{$}|>{$}r<{$}>{$}r<{$}|}
+\hline
+k&   a_k&   b_k&    q_k&  r_k&     c_k&     d_k&   e_k&   f_k\\
+\hline
+ &      &      &       &     &       1&       0&     0&     1\\
+0& 76415& 23205&      3& 6800&       0&       1&     1&     0\\
+1& 23205&  6800&      3& 2805&       1&      -3&     3&     1\\
+2&  6800&  2805&      2& 1190&      -3&      10&    10&     3\\
+3&  2805&  1190&      2&  425&       7&     -23&    23&     7\\
+4&  1190&   425&      2&  340&     -17&      56&    56&    17\\
+5&   425&   340&      1&   85&      41&    -135&   135&    41\\
+6&   340&    85&      4&    0&     -58&     191&   191&    58\\
+7&    85&     0&       &     &     273&    -899&   899&   273\\
+\hline
+\end{tabular}
+\end{center}
+Der grösste gemeinsame Teiler ist $\operatorname{ggT}(a,b)=85$.
+Aus der letzten Zeile der Tabelle kann man jetzt die Zahlen $u=e_7=899$
+und $v=f_7=273$ ablesen, und tatsächlich ist
+\[
+a=76415 = 899\cdot 85
+\qquad\text{und}\qquad
+b=23205 = 273 \cdot 85.
+\]
+Daraus kann man dann auch das kleinste gemeinsame Vielfache ablesen, es ist
+\[
+\operatorname{kgV}(a,b)
+=
+\operatorname{kgV}(76415,23205)
+=
+\left\{
+\begin{aligned}
+ub
+&=
+899\cdot 23205\\
+va
+&=
+273\cdot 76415
+\end{aligned}
+\right\}
+=
+20861295.
+\qedhere
+\]
+\end{beispiel}
+
+Der erweiterte Algorithmus kann auch dazu verwendet werden,
+das kleinste gemeinsame Vielfache zweier Polynome zu berechnen.
+Dies wird zum Beispiel bei der Decodierung des Reed-Solomon-Codes in
+Kapitel~\ref{chapter:reedsolomon} verwendet.
+
+
 
diff --git a/buch/papers/reedsolomon/experiments/f.m b/buch/papers/reedsolomon/experiments/f.m
new file mode 100644
index 0000000..6bdc741
--- /dev/null
+++ b/buch/papers/reedsolomon/experiments/f.m
@@ -0,0 +1,61 @@
+#
+# f.m -- Reed-Solomon-Visualisierung mit FFT
+#
+# (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+#
+N = 64;
+b = 32;
+l = N + b;
+
+signal = zeros(l,1);
+signal(1:N,1) = round(10 * rand(N,1));
+signal
+
+plot(abs(signal));
+xlim([1, l]);
+title("Signal");
+pause()
+
+codiert = fft(signal)
+
+plot(abs(codiert));
+xlim([1, l]);
+title("Codiert");
+pause()
+
+fehler = zeros(l,1);
+fehler(21,1) = 2;
+fehler(75,1) = 1;
+fehler(7,1) = 2;
+
+plot(fehler);
+xlim([1, l]);
+title("Fehler");
+pause()
+
+empfangen = codiert + fehler;
+
+plot(abs(empfangen));
+xlim([1, l]);
+title("Empfangen");
+pause()
+
+decodiert = ifft(empfangen)
+plot(abs(decodiert));
+xlim([1, l]);
+title("Decodiert");
+pause()
+
+syndrom = decodiert;
+syndrom(1:N,1) = zeros(N,1)
+plot(abs(syndrom));
+xlim([1, l]);
+title("Syndrom");
+pause()
+
+locator = abs(fft(syndrom))
+
+plot(locator);
+xlim([1, l]);
+title("Locator");
+pause()
diff --git a/buch/test3.tex b/buch/test3.tex
new file mode 100644
index 0000000..71b1529
--- /dev/null
+++ b/buch/test3.tex
@@ -0,0 +1,91 @@
+%
+% test3.tex -- Test 3
+%
+% (c) 2021 Prof. Dr. Andreas Mueller, OST
+%
+%\documentclass[a4paper,12pt]{book}
+\documentclass[a4paper,12pt]{article}
+\usepackage{geometry}
+\geometry{papersize={210mm,297mm},total={165mm,260mm}}
+\usepackage{ngerman}
+\usepackage[utf8]{inputenc}
+\usepackage[T1]{fontenc}
+\usepackage{times}
+\usepackage{amsmath}
+\usepackage{amssymb}
+\usepackage{amsfonts}
+\usepackage{amsthm}
+\usepackage{graphicx}
+\usepackage{fancyhdr}
+\usepackage{textcomp}
+\usepackage[all]{xy}
+\usepackage{txfonts}
+\usepackage{alltt}
+\usepackage{verbatim}
+\usepackage{paralist}
+\usepackage{makeidx}
+\usepackage{array}
+\usepackage{hyperref}
+\usepackage{caption}
+\usepackage{subcaption}
+\usepackage{standalone}
+\usepackage{environ}
+\usepackage{tikz}
+\input{../common/linsys.tex}
+\newcounter{beispiel}
+\newenvironment{beispiele}{
+\bgroup\smallskip\parindent0pt\bf Beispiele\egroup
+
+\begin{list}{\arabic{beispiel}.}
+  {\usecounter{beispiel}
+  \setlength{\labelsep}{5mm}
+  \setlength{\rightmargin}{0pt}
+}}{\end{list}}
+\newcounter{uebungsaufgabe}
+% environment fuer uebungsaufgaben
+\newenvironment{uebungsaufgaben}{
+\begin{list}{\arabic{uebungsaufgabe}.}
+  {\usecounter{uebungsaufgabe}
+  \setlength{\labelwidth}{2cm}
+  \setlength{\leftmargin}{0pt}
+  \setlength{\labelsep}{5mm}
+  \setlength{\rightmargin}{0pt}
+  \setlength{\itemindent}{0pt}
+}}{\end{list}\vfill\pagebreak}
+\newenvironment{teilaufgaben}{
+\begin{enumerate}
+\renewcommand{\labelenumi}{\alph{enumi})}
+}{\end{enumerate}}
+% Loesung
+\NewEnviron{loesung}{%
+\begin{proof}[Lösung]%
+\renewcommand{\qedsymbol}{$\bigcirc$}
+\BODY
+\end{proof}}
+\NewEnviron{bewertung}{\relax}
+\NewEnviron{diskussion}{
+\BODY
+}
+\RenewEnviron{loesung}{\relax}
+\RenewEnviron{diskussion}{\relax}
+\newenvironment{hinweis}{%
+\renewcommand{\qedsymbol}{}
+\begin{proof}[Hinweis]}{\end{proof}}
+
+\begin{document}
+{\parindent0pt\hbox to\hsize{%
+Name: \hbox to7cm{\dotfill} Vorname: \dotfill}}
+\vspace{0.5cm}
+
+\section*{Kurztest 3}
+
+\begin{uebungsaufgaben}
+
+\item
+\input chapters/60-gruppen/uebungsaufgaben/6001.tex
+%\item
+%\input chapters/60-gruppen/uebungsaufgaben/6002.tex
+
+\end{uebungsaufgaben}
+
+\end{document}
diff --git a/vorlesungen/00_template/mathman2.png b/vorlesungen/00_template/mathman2.png
new file mode 100644
index 0000000..70b2059
--- /dev/null
+++ b/vorlesungen/00_template/mathman2.png
diff --git a/vorlesungen/06_msegalois/common.tex b/vorlesungen/06_msegalois/common.tex
index 0700acf..50adc4f 100644
--- a/vorlesungen/06_msegalois/common.tex
+++ b/vorlesungen/06_msegalois/common.tex
@@ -9,7 +9,7 @@
 \usetheme[hideothersubsections,hidetitle]{Hannover}
 }
 \beamertemplatenavigationsymbolsempty
-\title[Titel]{Titel}
+\title[Galois]{Galois-Theorie}
 \author[A.~Müller]{Prof. Dr. Andreas Müller}
 \date[]{}
 \newboolean{presentation}
diff --git a/vorlesungen/06_msegalois/slides.tex b/vorlesungen/06_msegalois/slides.tex
index 37739aa..95695c4 100644
--- a/vorlesungen/06_msegalois/slides.tex
+++ b/vorlesungen/06_msegalois/slides.tex
@@ -5,28 +5,19 @@
 %
 
 \section{Körpererweiterungen}
-% XXX Was ist eine Körpererweiterung 
 \folie{4/galois/erweiterung.tex}
 
-\section{Galois-Gruppe}
-% XXX Übersetzung Körpererweiterungsstruktur in eine Gruppe
-\folie{4/galois/automorphismus.tex}
-
 \section{Geometrische Anwendungen}
-% XXX Geometrische Konstruktionen
 \folie{4/galois/konstruktion.tex}
-% XXX Verdoppelung des Würfels
 \folie{4/galois/wuerfel.tex}
-% XXX Dreiteilung des Winkels
 \folie{4/galois/winkeldreiteilung.tex}
-% XXX Quadratur des Kreises
 \folie{4/galois/quadratur.tex}
 
+\section{Galois-Gruppe}
+\folie{4/galois/automorphismus.tex}
+
 \section{Lösbarkeit durch Radikale}
-% XXX Wurzelformeln mit Radikalen
 \folie{4/galois/radikale.tex}
-% XXX Auflösbarkeit einer Gruppe
 \folie{4/galois/aufloesbarkeit.tex}
-% XXX S_n ist nicht auflösbar
 \folie{4/galois/sn.tex}
 
diff --git a/vorlesungen/07_lie/Makefile b/vorlesungen/07_lie/Makefile
new file mode 100644
index 0000000..1788301
--- /dev/null
+++ b/vorlesungen/07_lie/Makefile
@@ -0,0 +1,33 @@
+#
+# Makefile -- lie
+#
+# (c) 2017 Prof Dr Andreas Müller, Hochschule Rapperswil
+#
+all:	lie-handout.pdf MathSem-07-lie.pdf
+
+include ../slides/Makefile.inc
+
+SOURCES = common.tex slides.tex $(slides)
+
+MathSem-07-lie.pdf:	MathSem-07-lie.tex $(SOURCES)
+	pdflatex MathSem-07-lie.tex
+
+lie-handout.pdf:	lie-handout.tex $(SOURCES)
+	pdflatex lie-handout.tex
+
+thumbnail:	thumbnail.jpg fix1.jpg
+
+thumbnail.pdf:	MathSem-07-lie.pdf
+	pdfjam --outfile thumbnail.pdf --papersize '{16cm,9cm}' \
+		MathSem-07-lie.pdf 1
+thumbnail.jpg:	thumbnail.pdf
+	convert -density 300 thumbnail.pdf \
+                -resize 1920x1080 -units PixelsPerInch thumbnail.jpg
+
+fix1.pdf:	MathSem-07-lie.pdf
+	pdfjam --outfile fix1.pdf --papersize '{16cm,9cm}' \
+		MathSem-07-lie.pdf 205
+fix1.jpg:	fix1.pdf
+	convert -density 300 fix1.pdf \
+                -resize 1920x1080 -units PixelsPerInch fix1.jpg
+
diff --git a/vorlesungen/07_lie/MathSem-07-lie.tex b/vorlesungen/07_lie/MathSem-07-lie.tex
new file mode 100644
index 0000000..8a5557d
--- /dev/null
+++ b/vorlesungen/07_lie/MathSem-07-lie.tex
@@ -0,0 +1,18 @@
+%
+% MathSem-07-lie.tex -- Präsentation 
+%
+% (c) 2017 Prof Dr Andreas Müller, Hochschule Rapperswil
+%
+\documentclass[aspectratio=169]{beamer}
+\input{common.tex}
+\setboolean{presentation}{true}
+\begin{document}
+\begin{frame}
+\titlepage
+\vspace{-1.5cm}
+\begin{center}
+\includegraphics[width=10cm]{../slides/7/images/rodriguez.jpg}
+\end{center}
+\end{frame}
+\input{slides.tex}
+\end{document}
diff --git a/vorlesungen/07_lie/common.tex b/vorlesungen/07_lie/common.tex
new file mode 100644
index 0000000..8472b93
--- /dev/null
+++ b/vorlesungen/07_lie/common.tex
@@ -0,0 +1,16 @@
+%
+% common.tex -- gemeinsame definition
+%
+% (c) 2017 Prof Dr Andreas Müller, Hochschule Rapperswil
+%
+\input{../common/packages.tex}
+\input{../common/common.tex}
+\mode<beamer>{%
+\usetheme[hideothersubsections,hidetitle]{Hannover}
+}
+\beamertemplatenavigationsymbolsempty
+\title[Lie]{Lie-Gruppen und Lie-Algebren}
+\author[A.~Müller]{Prof. Dr. Andreas Müller}
+\date[]{}
+\newboolean{presentation}
+
diff --git a/vorlesungen/07_lie/lie-handout.tex b/vorlesungen/07_lie/lie-handout.tex
new file mode 100644
index 0000000..dbdb386
--- /dev/null
+++ b/vorlesungen/07_lie/lie-handout.tex
@@ -0,0 +1,11 @@
+%
+% lie-handout.tex -- Handout XXX
+%
+% (c) 2017 Prof Dr Andreas Müller, Hochschule Rapperswil
+%
+\documentclass[handout,aspectratio=169]{beamer}
+\input{common.tex}
+\setboolean{presentation}{false}
+\begin{document}
+\input{slides.tex}
+\end{document}
diff --git a/vorlesungen/07_lie/slides.tex b/vorlesungen/07_lie/slides.tex
new file mode 100644
index 0000000..19131d8
--- /dev/null
+++ b/vorlesungen/07_lie/slides.tex
@@ -0,0 +1,26 @@
+%
+% slides.tex -- Vorlesung über Lie-Theorie
+%
+% (c) 2017 Prof Dr Andreas Müller, Hochschule Rapperswil
+%
+\section{Matrizen-Gruppen}
+\folie{7/symmetrien.tex}
+\folie{7/algebraisch.tex}
+\folie{7/parameter.tex}
+\folie{7/mannigfaltigkeit.tex}
+\folie{7/sl2.tex}
+\folie{7/drehung.tex}
+\ifthenelse{\boolean{presentation}}{
+\folie{7/drehanim.tex}
+}{}
+\folie{7/semi.tex}
+
+\section{Ableitungen}
+\folie{7/kurven.tex}
+\folie{7/einparameter.tex}
+\folie{7/ableitung.tex}
+\folie{7/liealgebra.tex}
+\folie{7/kommutator.tex}
+
+\section{Exponentialabbildung}
+\folie{7/dg.tex}
diff --git a/vorlesungen/common/README b/vorlesungen/common/README
new file mode 100644
index 0000000..1ed40aa
--- /dev/null
+++ b/vorlesungen/common/README
@@ -0,0 +1,28 @@
+Die beiden Files
+
+    presentation-template.tex
+    slide-template.tex
+
+können als Basis für die eigene Präsentation verwendet werden.
+Dazu geht man wie folgt vor:
+
+1. In einem Arbeitsverzeichnis eine Kopie von presentation-template.tex
+anlegen und im file Author und Titel anpassen. Im Folgenden wird diese
+Kopie als beispiel-praesentation.tex bezeichnet.
+
+2. Für jede Folie der Präsentation im Arbeitsverzeichnis eine Kopie von
+slide-template.tex anlegen und den Inhalt anpassen.
+
+3. Die Slides mit Hilfe von Input-Befehlen, die in presentation-template.tex
+eingetragen werden, in die Präsentation importieren.
+
+4. Die Präsentation mit dem Befehl
+
+	pdflatex beispiel-praesentation.tex
+
+erzeugen, es entsteht das File beispile-praesentation.pdf
+
+Diese Vorgehen erlaubt, die Reihenfolge der Folien während der Vorbereitung
+zu ändern oder zwecks Beschleunigung des pdflatex-Laufs während der 
+Entwicklung auszukommentieren.
+
diff --git a/vorlesungen/common/presentation-template.tex b/vorlesungen/common/presentation-template.tex
new file mode 100644
index 0000000..9f92489
--- /dev/null
+++ b/vorlesungen/common/presentation-template.tex
@@ -0,0 +1,49 @@
+%
+% presentation-template.tex -- Präsentation 
+%
+% (c) 2021 Prof Dr Andreas Müller, Hochschule Rapperswil
+%
+\documentclass[aspectratio=169]{beamer}
+\usepackage[utf8]{inputenc}
+\usepackage[T1]{fontenc}
+\usepackage{epic}
+\usepackage{color}
+\usepackage{array}
+\usepackage{ifthen}
+\usepackage{lmodern}
+\usepackage{amsmath}
+\usepackage{amssymb}
+\usepackage{mathtools}
+\usepackage{adjustbox}
+\usepackage{multimedia}
+\usepackage{verbatim}
+\usepackage{wasysym}
+\usepackage{stmaryrd}
+\usepackage{tikz}
+\usetikzlibrary{shapes.geometric}
+\usetikzlibrary{decorations.pathreplacing}
+\usetikzlibrary{calc}
+\usetikzlibrary{arrows}
+\usetikzlibrary{3d}
+\usetikzlibrary{arrows,shapes,math,decorations.text,automata}
+\usepackage{pifont}
+\usepackage[all]{xy}
+\usepackage[many]{tcolorbox}
+\mode<beamer>{%
+\usetheme[hideothersubsections,hidetitle]{Hannover}
+}
+\beamertemplatenavigationsymbolsempty
+\title[Titel]{Titel}
+\author[A. Uthor]{A. Uthor}
+\date[]{}
+\newboolean{presentation}
+\setboolean{presentation}{true}
+\begin{document}
+
+\begin{frame}
+\titlepage
+\end{frame}
+
+%\input{slide.tex}
+
+\end{document}
diff --git a/vorlesungen/common/slide-template.tex b/vorlesungen/common/slide-template.tex
new file mode 100644
index 0000000..a1343f8
--- /dev/null
+++ b/vorlesungen/common/slide-template.tex
@@ -0,0 +1,19 @@
+%
+% template.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Template}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\end{column}
+\begin{column}{0.48\textwidth}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/4/galois/aufloesbarkeit.tex b/vorlesungen/slides/4/galois/aufloesbarkeit.tex
index 3215689..ef5902b 100644
--- a/vorlesungen/slides/4/galois/aufloesbarkeit.tex
+++ b/vorlesungen/slides/4/galois/aufloesbarkeit.tex
@@ -4,11 +4,117 @@
 % (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
 %
 \begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
 \frametitle{Auflösbarkeit}
+\vspace{-20pt}
 \begin{columns}[t,onlytextwidth]
 \begin{column}{0.48\textwidth}
+\uncover<2->{%
+\begin{block}{Radikalerweiterung}
+Automorphismen $f\in \operatorname{Gal}(\Bbbk(\alpha)/\Bbbk)$
+einer Radikalerweiterung
+\[
+\Bbbk \subset \Bbbk(\alpha)
+\]
+sind festgelegt durch Wahl von $f(\alpha)$.
+
+\begin{itemize}
+\item<3-> Warum: Alle $f(\alpha^k)$ sind auch festgelegt
+\item<4-> $f(\alpha)$ muss eine andere Nullstelle des Minimalpolynoms sein
+\end{itemize}
+
+\end{block}}
+\uncover<8->{%
+\begin{block}{Irreduzibles Polynom $m(X)\in\mathbb{Q}[X]$}
+$\mathbb{Q}\subset \Bbbk$,
+$n$ verschiedene Nullstellen $\mathbb{C}$:
+\[
+\uncover<9->{
+\operatorname{Gal}(\Bbbk/\mathbb{Q})
+\cong
+S_n}
+\uncover<10->{
+\quad
+\text{auflösbar?}}
+\]
+\end{block}}
 \end{column}
 \begin{column}{0.48\textwidth}
+\begin{block}{\uncover<5->{Galois-Gruppen}}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+\def\s{1.2}
+
+\uncover<2->{
+\fill[color=blue!20] (-1.1,-0.3)  rectangle (0.3,{5*\s+0.3});
+\node[color=blue] at (-0.7,{2.5*\s}) [rotate=90] {Radikalerweiterungen};
+}
+
+\node at (0,0) {$\mathbb{Q}$};
+\node at (0,{1*\s}) {$E_1$};
+\node at (0,{2*\s}) {$E_2$};
+\node at (0,{3*\s}) {$E_3$};
+\node at (0,{4*\s}) {$\vdots\mathstrut$};
+\node at (0,{5*\s}) {$\Bbbk$};
+\draw[shorten >= 0.3cm,shorten <= 0.3cm] (0,{0*\s}) -- (0,{1*\s});
+\draw[shorten >= 0.3cm,shorten <= 0.3cm] (0,{1*\s}) -- (0,{2*\s});
+\draw[shorten >= 0.3cm,shorten <= 0.3cm] (0,{2*\s}) -- (0,{3*\s});
+\draw[shorten >= 0.3cm,shorten <= 0.3cm] (0,{3*\s}) -- (0,{4*\s});
+\draw[shorten >= 0.3cm,shorten <= 0.3cm] (0,{4*\s}) -- (0,{5*\s});
+
+\begin{scope}[xshift=0.5cm]
+\uncover<7->{
+\fill[color=red!20] (0,{0*\s-0.3}) rectangle (4.8,{5*\s+0.3});
+\node[color=red] at (4.5,{2.5*\s}) [rotate=90] {Auflösung der Galois-Gruppe};
+}
+\uncover<5->{
+\node at (0,{0*\s}) [right] {$\operatorname{Gal}(\Bbbk/\mathbb{Q})$};
+\node at (0,{1*\s}) [right] {$\operatorname{Gal}(\Bbbk/E_1)$};
+\node at (0,{2*\s}) [right] {$\operatorname{Gal}(\Bbbk/E_2)$};
+\node at (0,{3*\s}) [right] {$\operatorname{Gal}(\Bbbk/E_3)$};
+\node at (1,{4*\s}) {$\vdots\mathstrut$};
+\node at (0,{5*\s}) [right] {$\operatorname{Gal}(\Bbbk/\Bbbk)$};
+\node at (1,{0.5*\s}) {$\cap\mathstrut$};
+\node at (1,{1.5*\s}) {$\cap\mathstrut$};
+\node at (1,{2.5*\s}) {$\cap\mathstrut$};
+\node at (1,{3.5*\s}) {$\cap\mathstrut$};
+\node at (1,{4.5*\s}) {$\cap\mathstrut$};
+}
+
+\uncover<6->{
+\begin{scope}[xshift=2.5cm]
+\node at (0,{0*\s}) {$G_n$};
+\node at (0,{1*\s}) {$G_{n-1}$};
+\node at (0,{2*\s}) {$G_{n-2}$};
+\node at (0,{3*\s}) {$G_{n-3}$};
+\node at (0,{5*\s}) {$G_0=\{e\}$};
+\node at (0,{0.5*\s}) {$\cap\mathstrut$};
+\node at (0,{1.5*\s}) {$\cap\mathstrut$};
+\node at (0,{2.5*\s}) {$\cap\mathstrut$};
+\node at (0,{3.5*\s}) {$\cap\mathstrut$};
+\node at (0,{4.5*\s}) {$\cap\mathstrut$};
+}
+
+\uncover<7->{
+\node[color=red] at (0.2,{0.5*\s+0.1}) [right] {\tiny $G_n/G_{n-1}$};
+\node[color=red] at (0.2,{0.5*\s-0.1}) [right] {\tiny abelsch};
+
+\node[color=red] at (0.2,{1.5*\s+0.1}) [right] {\tiny $G_{n-1}/G_{n-2}$};
+\node[color=red] at (0.2,{1.5*\s-0.1}) [right] {\tiny abelsch};
+
+\node[color=red] at (0.2,{2.5*\s+0.1}) [right] {\tiny $G_{n-2}/G_{n-3}$};
+\node[color=red] at (0.2,{2.5*\s-0.1}) [right] {\tiny abelsch};
+}
+
+\end{scope}
+\end{scope}
+
+
+
+\end{tikzpicture}
+\end{center}
+\end{block}
 \end{column}
 \end{columns}
 \end{frame}
diff --git a/vorlesungen/slides/4/galois/automorphismus.tex b/vorlesungen/slides/4/galois/automorphismus.tex
index ab666cf..6051813 100644
--- a/vorlesungen/slides/4/galois/automorphismus.tex
+++ b/vorlesungen/slides/4/galois/automorphismus.tex
@@ -4,11 +4,115 @@
 % (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
 %
 \begin{frame}[t]
-\frametitle{Automorphismen}
+\setlength{\abovedisplayskip}{4pt}
+\setlength{\belowdisplayskip}{4pt}
+\frametitle{Galois-Gruppe}
+\vspace{-20pt}
 \begin{columns}[t,onlytextwidth]
-\begin{column}{0.48\textwidth}
+\begin{column}{0.40\textwidth}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+\def\s{3.0}
+\begin{scope}[xshift=-1.5cm]
+\node at (0,{\s+0.1}) [above] {Körpererweiterung\strut};
+\node at (0,{\s}) {$G$};
+\draw[shorten >= 0.3cm,shorten <= 0.3cm] (0,{-\s}) -- (0,0);
+\draw[shorten >= 0.3cm,shorten <= 0.3cm] (0,{\s}) -- (0,0);
+\node at (0,{-0.5*\s}) [left] {$[F:E]$};
+\node at (0,{0.5*\s}) [left] {$[G:F]$};
+\node at (0,0) {$F$};
+\node at (0,{-\s}) {$E$};
+\end{scope}
+\uncover<3->{
+\begin{scope}[xshift=1.8cm]
+\node at (0,{\s+0.1}) [above] {Gruppe\strut};
+\fill (0,{-\s}) circle[radius=0.06];
+\fill (0,0) circle[radius=0.06];
+\fill (0,{\s}) circle[radius=0.06];
+\draw[shorten >= 0.1cm,shorten <= 0.1cm]
+	(0,{-\s}) to[out=100,in=-100] (0,{\s});
+\draw[shorten >= 0.1cm,shorten <= 0.1cm]
+	(0,{-\s}) to[out=80,in=-80] (0,0);
+\draw[shorten >= 0.1cm,shorten <= 0.1cm]
+	(0,0) to[out=80,in=-80] (0,{\s});
+\node at (-0.6,0) [rotate=90] {$\operatorname{Gal}(G/E)$};
+\node at (0.45,{0.5*\s}) [rotate=90] {$\operatorname{Gal}(G/F)$};
+\node at (0.45,{-0.5*\s}) [rotate=90] {$\operatorname{Gal}(F/E)$};
+\end{scope}
+\draw[->,color=red!20,line width=14pt] (-1.4,{0.6*\s}) -- (1.4,{0.6*\s});
+\node[color=red] at (0,{0.6*\s}) {$\operatorname{Gal}$};
+}
+\uncover<4->{
+\draw[<-,color=blue!20,line width=14pt] (-1.4,{-0.6*\s}) -- (1.4,{-0.6*\s});
+\node[color=blue] at (0,{-0.6*\s}) {$\operatorname{Fix}, F^H$};
+}
+\end{tikzpicture}
+\end{center}
 \end{column}
-\begin{column}{0.48\textwidth}
+\begin{column}{0.56\textwidth}
+\uncover<2->{%
+\begin{block}{Automorphismus}
+\vspace{-10pt}
+\[
+\operatorname{Aut}(F)
+=
+\left\{
+f\colon F\to F
+\left|
+\begin{aligned}
+f(x+y)&=f(x)+f(y)\\
+f(xy)&=f(x)f(y)
+\end{aligned}
+\right.
+\right\}
+\]
+\end{block}}
+\vspace{-10pt}
+\uncover<3->{%
+\begin{block}{Galois-Gruppe}
+Automorphismen, die $E$ festlassen
+\[
+{\color{red}
+\operatorname{Gal}(F/E)
+}
+=
+\left\{
+\varphi\in\operatorname{Aut}(F)\;|\; \varphi(x)=x\forall x\in E
+\right\}
+\]
+\end{block}}
+\vspace{-10pt}
+\uncover<4->{%
+\begin{block}{Fixkörper}
+$H\subset \operatorname{Aut}(F)$:
+\begin{align*}
+{\color{blue}F^H}
+&=
+\{x\in F\;|\; hx = x\forall h\in H\}
+=\operatorname{Fix}(H)
+\end{align*}
+\end{block}}
+\vspace{-13pt}
+\uncover<5->{%
+\begin{block}{Beispiel}
+\begin{itemize}
+\item<6->
+\(
+\operatorname{Gal}(\mathbb{C}/\mathbb{R})
+=
+\{
+\operatorname{id}_{\mathbb{C}},
+\operatorname{conj}\colon z\mapsto\overline{z}
+\}
+\)
+\item<7->
+\(
+\mathbb{C}^{\operatorname{conj}}
+=
+\mathbb{R}
+\)
+\end{itemize}
+\end{block}}
 \end{column}
 \end{columns}
 \end{frame}
diff --git a/vorlesungen/slides/4/galois/erweiterung.tex b/vorlesungen/slides/4/galois/erweiterung.tex
index 1cf0bec..6909849 100644
--- a/vorlesungen/slides/4/galois/erweiterung.tex
+++ b/vorlesungen/slides/4/galois/erweiterung.tex
@@ -4,11 +4,62 @@
 % (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
 %
 \begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
 \frametitle{Körpererweiterungen}
+\vspace{-20pt}
 \begin{columns}[t,onlytextwidth]
 \begin{column}{0.48\textwidth}
+\begin{block}{Körpererweiterung}
+$E,F$ Körper: $E\subset F$
+\end{block}
+\uncover<6->{%
+\begin{block}{Vektorraum}
+$F$ ist ein Vektorraum über $E$
+\end{block}}
+\uncover<7->{%
+\begin{block}{Endliche Körpererweiterung}
+$\dim_E F < \infty$
+\end{block}}
+\uncover<8->{%
+\begin{block}{Adjunktion eines $\alpha$}
+$\Bbbk(\alpha)$ kleinster Körper, der $\Bbbk$ und
+$\alpha$ enthält.
+\end{block}}
+\uncover<9->{%
+\begin{block}{Algebraische Erweiterung}
+$\alpha$ algebraisch über $\Bbbk$, i.~e.~Nullstelle von
+$m(X)\in\Bbbk[X]$
+\end{block}}
 \end{column}
 \begin{column}{0.48\textwidth}
+\uncover<2->{%
+\begin{block}{Beispiele}
+\begin{enumerate}
+\item<3->
+$\mathbb{R} \subset \mathbb{R}(i) = \mathbb{C}$
+\item<4->
+$\mathbb{Q}\subset \mathbb{Q}(\sqrt{2})$
+\item<5->
+$\mathbb{Q} \subset \mathbb{Q}(\sqrt{2}) \subset \mathbb{Q}(\sqrt[4]{2})$
+\end{enumerate}
+\end{block}}
+\uncover<7->{%
+\begin{block}{Grad}
+$E\subset F$ heisst Körpererweiterung vom Grad $n$, falls
+\[
+\dim_E F  = n =: [F:E]
+\]
+\uncover<8->{%
+Gleichbedeutend: $\deg m(X) = n$}
+\uncover<10->{%
+\[
+E\subset F\subset G
+\Rightarrow
+[G:E] = [G:F]\cdot [F:E]
+\]
+(in unseren Fällen)}
+\end{block}}
 \end{column}
 \end{columns}
 \end{frame}
diff --git a/vorlesungen/slides/4/galois/konstruktion.tex b/vorlesungen/slides/4/galois/konstruktion.tex
index 6afa359..094b570 100644
--- a/vorlesungen/slides/4/galois/konstruktion.tex
+++ b/vorlesungen/slides/4/galois/konstruktion.tex
@@ -142,4 +142,6 @@ $\Rightarrow$ jede beliebige Quadratwurzel kann konstruiert werden}
 \end{center}}
 \end{column}
 \end{columns}
+\uncover<14->{{\usebeamercolor[fg]{title}Folgerung:}
+Konstruierbar sind Körpererweiterungen $[F:E] = 2^l$}
 \end{frame}
diff --git a/vorlesungen/slides/4/galois/radikale.tex b/vorlesungen/slides/4/galois/radikale.tex
index 52fc4b9..e9e4ce8 100644
--- a/vorlesungen/slides/4/galois/radikale.tex
+++ b/vorlesungen/slides/4/galois/radikale.tex
@@ -4,11 +4,66 @@
 % (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
 %
 \begin{frame}[t]
-\frametitle{Radikale}
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Lösung durch Radikale}
+\vspace{-20pt}
 \begin{columns}[t,onlytextwidth]
 \begin{column}{0.48\textwidth}
+\begin{block}{Problemstellung}
+Finde Nullstellen eines Polynomes
+\[
+p(X)
+=
+a_nX^n + a_{n-1}X^{n-1}
++\dots+
+a_1X+a_0
+\]
+$p\in\mathbb{Q}[X]$
+\end{block}
+\uncover<2->{%
+\begin{block}{Radikale}
+Geschachtelte Wurzelausdrücke
+\[
+\sqrt[3]{
+-\frac{q}2 +\sqrt{\frac{q^2}{4}+\frac{p^3}{27}}
+}
++
+\sqrt[3]{
+-\frac{q}2 -\sqrt{\frac{q^2}{4}+\frac{p^3}{27}}
+}
+\]
+\uncover<3->{(Lösung von $x^3+px+q=0$)}
+\end{block}}
+\uncover<4->{%
+\begin{block}{Lösbar durch Radikale}
+Nullstelle von $p(X)$ ist ein Radikal
+\end{block}}
 \end{column}
 \begin{column}{0.48\textwidth}
+\uncover<5->{%
+\begin{block}{Algebraische Formulierung}
+Gegeben ein irreduzibles Polynom $p\in\mathbb{Q}[X]$,
+finde eine Körpererweiterung $\mathbb{Q}\subset\Bbbk$, derart,
+dass $p$ in $\Bbbk$ eine Nullstelle hat\uncover<6->{:
+$\Bbbk = \mathbb{Q}[X]/(p)$}
+\end{block}}
+\uncover<7->{%
+\begin{block}{Radikalerweiterung}
+Körpererweiterung $\Bbbk\subset\Bbbk'$ um $\alpha$ mit einer der Eigenschaften
+\begin{itemize}
+\item<8-> $\alpha$ ist eine Einheitswurzel
+\item<9-> $\alpha^k\in\Bbbk$
+\end{itemize}
+\end{block}}
+\vspace{-5pt}
+\uncover<10->{%
+\begin{block}{Lösbar durch Radikale}
+Radikalerweiterungen
+\[
+\mathbb{Q} \subset \Bbbk \subset \Bbbk' \subset \dots \subset \Bbbk'' \ni \alpha
+\]
+\end{block}}
 \end{column}
 \end{columns}
 \end{frame}
diff --git a/vorlesungen/slides/4/galois/sn.tex b/vorlesungen/slides/4/galois/sn.tex
index 0e3ebe2..1cae3fa 100644
--- a/vorlesungen/slides/4/galois/sn.tex
+++ b/vorlesungen/slides/4/galois/sn.tex
@@ -4,11 +4,84 @@
 % (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
 %
 \begin{frame}[t]
-\frametitle{Auflösbarkeit von $S_n$}
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Nichtauflösbarkeit von $S_n$}
+\vspace{-20pt}
 \begin{columns}[t,onlytextwidth]
 \begin{column}{0.48\textwidth}
+\begin{block}{Die symmetrische Gruppe $S_n$}
+Permutationen auf $n$ Elementen
+\[
+\sigma
+=
+\begin{pmatrix}
+1&2&3&\dots&n\\
+\sigma(1)&\sigma(2)&\sigma(3)&\dots&\sigma(n)
+\end{pmatrix}
+\]
+\end{block}
+\vspace{-10pt}
+\uncover<2->{%
+\begin{block}{Signum}
+$t(\sigma)=\mathstrut$ Anzahl Transpositionen
+\[
+\operatorname{sgn}(\sigma)
+=
+(-1)^{t(\sigma)}
+=
+\begin{cases}
+\phantom{-}1&\text{$t(\sigma)$ gerade}
+\\
+-1&\text{$t(\sigma)$ ungerade}
+\end{cases}
+\]
+Homomorphismus!
+\end{block}}
+\uncover<3->{%
+\begin{block}{Die alternierende Gruppe $A_n$}
+\vspace{-12pt}
+\[
+A_n = \ker \operatorname{sgn}
+=
+\{\sigma\in  S_n\;|\;\operatorname{sgn}(\sigma)=1\}
+\]
+\end{block}}
 \end{column}
 \begin{column}{0.48\textwidth}
+\uncover<4->{%
+\begin{block}{Normale Untergruppe}
+\begin{itemize}
+\item
+$H\triangleleft G$ wenn $gHg^{-1}\subset G\;\forall g\in G$
+\item
+$G/N$ ist wohldefiniert
+\end{itemize}
+\end{block}}
+\vspace{-10pt}
+\uncover<5->{%
+\begin{block}{Einfache Gruppe}
+$G$ einfach $\Leftrightarrow$
+\[
+H\triangleleft G
+\;
+\Rightarrow
+\;
+\text{$H=\{e\}$ oder $H=G$}
+\]
+\end{block}}
+\vspace{-10pt}
+\uncover<6->{%
+\begin{block}{$n\ge 5 \Rightarrow A_n \text{ einfach}$}
+\begin{enumerate}
+\item<7-> Zeigen, dass $A_5$ einfach ist
+\item<8-> Vollständige Induktion: $A_n$ einfach $\Rightarrow A_{n+1}$ einfach
+\end{enumerate}
+\uncover<9->{%
+$\Rightarrow$ i.~A.~keine Lösung der 
+einer Polynomgleichung vom Grad $\ge 5$ durch Radikale
+}
+\end{block}}
 \end{column}
 \end{columns}
 \end{frame}
diff --git a/vorlesungen/slides/7/Makefile.inc b/vorlesungen/slides/7/Makefile.inc
new file mode 100644
index 0000000..7afeea1
--- /dev/null
+++ b/vorlesungen/slides/7/Makefile.inc
@@ -0,0 +1,22 @@
+#
+# Makefile.inc -- additional depencencies
+#
+# (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+#
+chapter5 =								\
+	../slides/7/symmetrien.tex					\
+	../slides/7/algebraisch.tex					\
+	../slides/7/parameter.tex					\
+	../slides/7/mannigfaltigkeit.tex				\
+	../slides/7/sl2.tex						\
+	../slides/7/drehung.tex						\
+	../slides/7/drehanim.tex					\
+	../slides/7/semi.tex						\
+	../slides/7/kurven.tex						\
+	../slides/7/einparameter.tex					\
+	../slides/7/ableitung.tex					\
+	../slides/7/liealgebra.tex					\
+	../slides/7/kommutator.tex					\
+	../slides/7/dg.tex						\
+	../slides/7/chapter.tex
+
diff --git a/vorlesungen/slides/7/ableitung.tex b/vorlesungen/slides/7/ableitung.tex
new file mode 100644
index 0000000..12f9084
--- /dev/null
+++ b/vorlesungen/slides/7/ableitung.tex
@@ -0,0 +1,68 @@
+%
+% ableitung.tex -- Ableitung in der Lie-Gruppe
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Ableitung in der Matrix-Gruppe}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Ableitung in $\operatorname{O}(n)$}
+\uncover<2->{%
+$s \mapsto A(s)\in\operatorname{O}(n)$
+}
+\begin{align*}
+\uncover<3->{I
+&=
+A(s)^tA(s)}
+\\
+\uncover<4->{0
+=
+\frac{d}{ds} I
+&=
+\frac{d}{ds} (A(s)^t A(s))}
+\\
+&\uncover<5->{=
+\dot{A}(s)^tA(s) + A(s)^t \dot{A}(s)}
+\intertext{\uncover<6->{An der Stelle $s=0$, d.~h.~$A(0)=I$}}
+\uncover<7->{0
+&=
+\dot{A}(0)^t
++
+\dot{A}(0)}
+\\
+\uncover<8->{\Leftrightarrow
+\qquad
+\dot{A}(0)^t &= -\dot{A}(0)}
+\end{align*}
+\uncover<9->{%
+``Tangentialvektoren'' sind antisymmetrische Matrizen
+}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\begin{block}{Ableitung in $\operatorname{SL}_2(\mathbb{R})$}
+\uncover<2->{%
+$s\mapsto A(s)\in\operatorname{SL}_n(\mathbb{R})$
+}
+\begin{align*}
+\uncover<3->{1 &= \det A(t)}
+\\
+\uncover<10->{0
+=
+\frac{d}{dt}1
+&=
+\frac{d}{dt} \det A(t)}
+\intertext{\uncover<11->{mit dem Entwicklungssatz kann man nachrechnen:}}
+\uncover<12->{0&=\operatorname{Spur}\dot{A}(0)}
+\end{align*}
+\uncover<13->{``Tangentialvektoren'' sind spurlose Matrizen}
+\end{block}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/algebraisch.tex b/vorlesungen/slides/7/algebraisch.tex
new file mode 100644
index 0000000..31d209a
--- /dev/null
+++ b/vorlesungen/slides/7/algebraisch.tex
@@ -0,0 +1,115 @@
+%
+% algebraisch.tex -- algebraische Definition der Symmetrien
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Erhaltungsgrössen und Algebra}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Längen und Winkel}
+Längenmessung mit Skalarprodukt
+\begin{align*}
+\|\vec{v}\|^2
+&=
+\langle \vec{v},\vec{v}\rangle
+=
+\vec{v}\cdot \vec{v}
+\uncover<2->{=
+\vec{v}^t\vec{v}}
+\end{align*}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<3->{%
+\begin{block}{Flächeninhalt/Volumen}
+$n$ Vektoren $V=(\vec{v}_1,\dots,\vec{v}_n)$
+\\
+Volumen des Parallelepipeds: $\det V$
+\end{block}}
+\end{column}
+\end{columns}
+%
+\vspace{-7pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\uncover<4->{%
+\begin{block}{Längenerhaltende Transformationen}
+$A\in\operatorname{GL}_n(\mathbb{R})$
+\begin{align*}
+\vec{x}^t\vec{y}
+&=
+(A\vec{x})
+\cdot
+(A\vec{y})
+\uncover<5->{=
+(A\vec{x})^t
+(A\vec{y})}
+\\
+\uncover<6->{
+\vec{x}^tI\vec{y}
+&=
+\vec{x}^tA^tA\vec{y}}
+\uncover<7->{
+\Rightarrow I=A^tA}
+\end{align*}
+\uncover<8->{Begründung: $\vec{e}_i^t B \vec{e}_j = b_{ij}$}
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<9->{%
+\begin{block}{Volumenerhaltende Transformationen}
+$A\in\operatorname{GL}_n(\mathbb{R})$
+\begin{align*}
+\det(V)
+&=
+\det(AV)
+\uncover<10->{=
+\det(A)\det(V)}
+\\
+\uncover<11->{
+1&=\det(A)}
+\end{align*}
+\uncover<10->{
+(Produktsatz für Determinante)
+}
+\end{block}}
+\end{column}
+\end{columns}
+%
+\vspace{-3pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\uncover<12->{%
+\begin{block}{Orthogonale Matrizen}
+Längentreue Abbildungen = orthogonale Matrizen:
+\[
+O(n)
+=
+\{
+A \in \operatorname{GL}_n(\mathbb{R})
+\;|\;
+A^tA=I
+\}
+\]
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<13->{%
+\begin{block}{``Spezielle'' Matrizen}
+Volumen-/Orientierungserhaltende Transformationen:
+\[
+\operatorname{SL}_n(\mathbb R) 
+=
+\{ A \in \operatorname{GL}_n(\mathbb{R}) \;|\; \det A = 1\}
+\]
+\end{block}}
+\end{column}
+\end{columns}
+
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/chapter.tex b/vorlesungen/slides/7/chapter.tex
new file mode 100644
index 0000000..079cf16
--- /dev/null
+++ b/vorlesungen/slides/7/chapter.tex
@@ -0,0 +1,19 @@
+%
+% chapter.tex
+%
+% (c) 2021 Prof Dr Andreas Müller, Hochschule Rapperswi
+%
+\folie{7/symmetrien.tex}
+\folie{7/algebraisch.tex}
+\folie{7/parameter.tex}
+\folie{7/mannigfaltigkeit.tex}
+\folie{7/sl2.tex}
+\folie{7/drehung.tex}
+\folie{7/drehanim.tex}
+\folie{7/semi.tex}
+\folie{7/kurven.tex}
+\folie{7/einparameter.tex}
+\folie{7/ableitung.tex}
+\folie{7/liealgebra.tex}
+\folie{7/kommutator.tex}
+\folie{7/dg.tex}
diff --git a/vorlesungen/slides/7/dg.tex b/vorlesungen/slides/7/dg.tex
new file mode 100644
index 0000000..4447bac
--- /dev/null
+++ b/vorlesungen/slides/7/dg.tex
@@ -0,0 +1,92 @@
+%
+% dg.tex -- Differentialgleichung für die Exponentialabbildung
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Zurück zur Lie-Gruppe}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Tangentialvektor im Punkt $\gamma(t)$}
+Ableitung von $\gamma(t)$ an der Stelle $t$:
+\begin{align*}
+\dot{\gamma}(t)
+&\uncover<2->{=
+\frac{d}{d\tau}\gamma(\tau)\bigg|_{\tau=t}
+}
+\\
+&\uncover<3->{=
+\frac{d}{ds}
+\gamma(t+s)
+\bigg|_{s=0}
+}
+\\
+&\uncover<4->{=
+\frac{d}{ds}
+\gamma(t)\gamma(s)
+\bigg|_{s=0}
+}
+\\
+&\uncover<5->{=
+\gamma(t)
+\frac{d}{ds}
+\gamma(s)
+\bigg|_{s=0}
+}
+\uncover<6->{=
+\gamma(t) \dot{\gamma}(0)
+}
+\end{align*}
+\end{block}
+\vspace{-10pt}
+\uncover<7->{%
+\begin{block}{Differentialgleichung}
+\vspace{-10pt}
+\[
+\dot{\gamma}(t) = \gamma(t) A
+\quad
+\text{mit}
+\quad
+A=\dot{\gamma}(0)\in LG
+\]
+\end{block}}
+\end{column}
+\begin{column}{0.50\textwidth}
+\uncover<8->{%
+\begin{block}{Lösung}
+Exponentialfunktion
+\[
+\exp\colon LG\to G : A \mapsto \exp(At) = \sum_{k=0}^\infty \frac{t^k}{k!}A^k
+\]
+\end{block}}
+\vspace{-5pt}
+\uncover<9->{%
+\begin{block}{Kontrolle: Tangentialvektor berechnen}
+\vspace{-10pt}
+\begin{align*}
+\frac{d}{dt}e^{At}
+&\uncover<10->{=
+\sum_{k=1}^\infty A^k \frac{d}{dt} \frac{t^k}{k!}
+}
+\\
+&\uncover<11->{=
+\sum_{k=1}^\infty A^{k-1}\frac{t^{k-1}}{(k-1)!} A
+}
+\\
+&\uncover<12->{=
+\sum_{k=0} A^k\frac{t^k}{k!}
+A
+}
+\uncover<13->{=
+e^{At} A
+}
+\end{align*}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/drehanim.tex b/vorlesungen/slides/7/drehanim.tex
new file mode 100644
index 0000000..ac136f1
--- /dev/null
+++ b/vorlesungen/slides/7/drehanim.tex
@@ -0,0 +1,155 @@
+%
+% template.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+
+\definecolor{darkgreen}{rgb}{0,0.6,0}
+\def\punkt#1#2{ ({\A*(#1)+\B*(#2)},{\C*(#1)+\D*(#2)}) }
+
+\makeatletter
+\hoffset=-2cm
+\advance\textwidth2cm
+\hsize\textwidth
+\columnwidth\textwidth
+\makeatother
+
+\begin{frame}[t,plain]
+\vspace{-5pt}
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+
+\fill[color=white] (-4,-4) rectangle (9,4.5);
+
+\def\a{60}
+
+\pgfmathparse{tan(\a)}
+\xdef\T{\pgfmathresult}
+
+\pgfmathparse{-sin(\a)*cos(\a)}
+\xdef\S{\pgfmathresult}
+
+\pgfmathparse{1/cos(\a)}
+\xdef\E{\pgfmathresult}
+
+\def\N{20}
+\pgfmathparse{2*\N}
+\xdef\Nzwei{\pgfmathresult}
+\pgfmathparse{3*\N}
+\xdef\Ndrei{\pgfmathresult}
+
+\node at (4.2,4.2) [below right] {\begin{minipage}{7cm}
+\begin{block}{$\operatorname{SO}(2)\subset\operatorname{SL}_2(\mathbb{R})$}
+\begin{itemize}
+\item Thus most $A\in\operatorname{SL}_2(\mathbb{R})$ can be parametrized
+as shear mappings and axis rescalings
+\[
+A=
+\begin{pmatrix}d&0\\0&d^{-1}\end{pmatrix}
+\begin{pmatrix}1&s\\0&1\end{pmatrix}
+\begin{pmatrix}1&0\\t&1\end{pmatrix}
+\]
+\item Most rotations can be decomposed into a product of
+shear mappings and axis rescalings
+\end{itemize}
+\end{block}
+\end{minipage}};
+
+\foreach \d in {1,2,...,\Ndrei}{
+	% Scherung in Y-Richtung
+	\ifnum \d>\N
+		\pgfmathparse{\T}
+	\else
+		\pgfmathparse{\T*(\d-1)/(\N-1)}
+	\fi
+	\xdef\t{\pgfmathresult}
+
+	% Scherung in X-Richtung
+	\ifnum \d>\Nzwei
+		\xdef\s{\S}
+	\else
+		\ifnum \d<\N
+			\xdef\s{0}
+		\else
+			\ifnum \d=\N
+				\xdef\s{0}
+			\else
+				\pgfmathparse{\S*(\d-\N-1)/(\N-1)}
+				\xdef\s{\pgfmathresult}
+			\fi
+		\fi
+	\fi
+
+	% Reskalierung der Achsen
+	\ifnum \d>\Nzwei
+		\pgfmathparse{exp(ln(\E)*(\d-2*\N-1)/(\N-1))}
+	\else
+		\pgfmathparse{1}
+	\fi
+	\xdef\e{\pgfmathresult}
+
+	% Matrixelemente 
+	\pgfmathparse{(\e)*((\s)*(\t)+1)}
+	\xdef\A{\pgfmathresult}
+
+	\pgfmathparse{(\e)*(\s)}
+	\xdef\B{\pgfmathresult}
+
+	\pgfmathparse{(\t)/(\e)}
+	\xdef\C{\pgfmathresult}
+
+	\pgfmathparse{1/(\e)}
+	\xdef\D{\pgfmathresult}
+
+	\only<\d>{
+		\node at (5.0,-0.9) [below right] {$
+			\begin{aligned}
+				t &= \t                 \\
+				s &= \s                 \\
+				d &= \e                 \\
+				D &= \begin{pmatrix}
+					\A&\B\\
+					\C&\D
+				     \end{pmatrix}
+					\qquad
+					\only<60>{\checkmark}
+			\end{aligned}
+		$};
+	}
+
+	\begin{scope}
+		\clip (-4.05,-4.05) rectangle (4.05,4.05);
+		\only<\d>{
+			\foreach \x in {-6,...,6}{
+				\draw[color=blue,line width=0.5pt]
+					\punkt{\x}{-12} -- \punkt{\x}{12};
+			}
+			\foreach \y in {-12,...,12}{
+				\draw[color=darkgreen,line width=0.5pt]
+					\punkt{-6}{\y} -- \punkt{6}{\y};
+			}
+
+			\foreach \r in {1,2,3,4}{
+				\draw[color=red] plot[domain=0:359,samples=360]
+					({\r*(\A*cos(\x)+\B*sin(\x))},{\r*(\C*cos(\x)+\D*sin(\x))})
+					--
+					cycle;
+			}
+		}
+	\end{scope}
+
+%	\uncover<\d>{
+%		\node at (5,4) {\d};
+%	}
+}
+
+\draw[->] (-4,0) -- (4.2,0) coordinate[label={$x$}];
+\draw[->] (0,-4) -- (0,4.2) coordinate[label={right:$y$}];
+
+\end{tikzpicture}
+\end{center}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/drehung.tex b/vorlesungen/slides/7/drehung.tex
new file mode 100644
index 0000000..2d7b317
--- /dev/null
+++ b/vorlesungen/slides/7/drehung.tex
@@ -0,0 +1,132 @@
+%
+% drehung.tex -- Drehung aus streckungen
+%
+% (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{Drehung aus Streckungen und Scherungen}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.38\textwidth}
+\begin{block}{Drehung}
+{\color{blue}Längen}, {\color<2->{blue}Winkel},
+{\color<2->{darkgreen}Orientierung}
+erhalten
+\uncover<2->{
+\[
+\operatorname{SO}(2)
+=
+{\color{blue}\operatorname{O}(2)}
+\cap
+{\color{darkgreen}\operatorname{SL}_2(\mathbb{R})}
+\]}
+\vspace{-20pt}
+\end{block}
+\uncover<3->{%
+\begin{block}{Zusammensetzung}
+Eine Drehung muss als Zusammensetzung geschrieben werden können:
+\[
+D_{\alpha} 
+=
+\begin{pmatrix}
+\cos\alpha & -\sin\alpha\\
+\sin\alpha &\phantom{-}\cos\alpha
+\end{pmatrix}
+=
+DST
+\]
+\end{block}}
+\vspace{-10pt}
+\uncover<12->{%
+\begin{block}{Beispiel}
+\vspace{-12pt}
+\[
+D_{60^\circ}
+=
+{\tiny
+\begin{pmatrix}2&0\\0&\frac12\end{pmatrix}
+\begin{pmatrix}1&-\frac{\sqrt{3}}4\\0&1\end{pmatrix}
+\begin{pmatrix}1&0\\\sqrt{3}&1\end{pmatrix}
+}
+\]
+\end{block}}
+\end{column}
+\begin{column}{0.58\textwidth}
+\uncover<4->{%
+\begin{block}{Ansatz}
+\vspace{-12pt}
+\begin{align*}
+DST
+&=
+\begin{pmatrix}
+c^{-1}&0\\
+  0   &c
+\end{pmatrix}
+\begin{pmatrix}
+1&-s\\
+0&1
+\end{pmatrix}
+\begin{pmatrix}
+1&0\\
+t&1
+\end{pmatrix}
+\\
+&\uncover<5->{=
+\begin{pmatrix}
+c^{-1}&0\\
+  0   &c
+\end{pmatrix}
+\begin{pmatrix}
+1-st&-s\\
+   t& 1
+\end{pmatrix}
+}
+\\
+&\uncover<6->{=
+\begin{pmatrix}
+{\color<11->{orange}(1-st)c^{-1}}&{\color<10->{darkgreen}sc^{-1}}\\
+{\color<9->{blue}ct}&{\color<8->{red}c}
+\end{pmatrix}}
+\uncover<7->{=
+\begin{pmatrix}
+{\color<11->{orange}\cos\alpha} & {\color<10->{darkgreen}- \sin\alpha} \\
+{\color<9->{blue}\sin\alpha} & \phantom{-}  {\color<8->{red}\cos\alpha}
+\end{pmatrix}}
+\end{align*}
+\end{block}}
+\vspace{-10pt}
+\uncover<7->{%
+\begin{block}{Koeffizientenvergleich}
+\vspace{-15pt}
+\begin{align*}
+\uncover<8->{
+{\color{red} c}
+&=
+{\color{red}\cos\alpha }}
+&&
+&
+\uncover<9->{
+{\color{blue}
+t}&=\rlap{$\displaystyle\frac{\sin\alpha}{c} = \tan\alpha$}}\\
+\uncover<10->{
+{\color{darkgreen}sc^{-1}}&={\color{darkgreen}-\sin\alpha}
+&
+&\Rightarrow&
+{\color{darkgreen}s}&={\color{darkgreen}-\sin\alpha}\cos\alpha
+}
+\\
+\uncover<11->{
+{\color{orange} (1-st)c^{-t}}
+&=
+\rlap{$\displaystyle\frac{(1-\sin^2\alpha)}{\cos\alpha} = \cos\alpha $}
+}
+\end{align*}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/einparameter.tex b/vorlesungen/slides/7/einparameter.tex
new file mode 100644
index 0000000..5171085
--- /dev/null
+++ b/vorlesungen/slides/7/einparameter.tex
@@ -0,0 +1,93 @@
+%
+% einparameter.tex -- Einparameter Untergruppen
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Einparameter-Untergruppen}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Definition}
+Eine Kurve $\gamma\colon \mathbb{R}\to G\subset\operatorname{GL}_n(\mathbb{R})$,
+die {\color<2->{red}gleichzeitig eine Untergruppe von $G$} ist \uncover<3->{mit}
+\[
+\uncover<3->{
+\gamma(t+s) = \gamma(t)\gamma(s)\quad\forall t,s\in\mathbb{R}
+}
+\]
+\end{block}
+\uncover<4->{%
+\begin{block}{Drehungen}
+Drehmatrizen bilden Einparameter- Untergruppen
+\begin{align*}
+t \mapsto D_{x,t}
+&=
+\begin{pmatrix}
+1&0&0\\
+0&\cos t&-\sin t\\
+0&\sin t& \cos t
+\end{pmatrix}
+\\
+D_{x,t}D_{x,s}
+&=
+D_{x,t+s}
+\end{align*}
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<5->{%
+\begin{block}{Scherungen in $\operatorname{SL}_2(\mathbb{R})$}
+\vspace{-12pt}
+\[
+\begin{pmatrix}
+1&s\\
+0&1
+\end{pmatrix}
+\begin{pmatrix}
+1&t\\
+0&1
+\end{pmatrix}
+=
+\begin{pmatrix}
+1&s+t\\
+0&1
+\end{pmatrix}
+\]
+\end{block}}
+\vspace{-12pt}
+\uncover<6->{%
+\begin{block}{Skalierungen in $\operatorname{SL}_2(\mathbb{R})$}
+\vspace{-12pt}
+\[
+\begin{pmatrix}
+e^s&0\\0&e^{-s}
+\end{pmatrix}
+\begin{pmatrix}
+e^t&0\\0&e^{-t}
+\end{pmatrix}
+=
+\begin{pmatrix}
+e^{t+s}&0\\0&e^{-(t+s)}
+\end{pmatrix}
+\]
+\end{block}}
+\vspace{-12pt}
+\uncover<7->{%
+\begin{block}{Gemischt}
+\vspace{-12pt}
+\begin{gather*}
+A_t = I \cosh t + \begin{pmatrix}1&a\\0&-1\end{pmatrix}\sinh t
+\\
+\text{dank}\quad
+\begin{pmatrix}1&s\\0&-1\end{pmatrix}^2
+=I
+\end{gather*}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/images/Makefile b/vorlesungen/slides/7/images/Makefile
new file mode 100644
index 0000000..cc67c8a
--- /dev/null
+++ b/vorlesungen/slides/7/images/Makefile
@@ -0,0 +1,19 @@
+#
+# Makefile -- Illustrationen zu 
+#
+# (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+# 
+all:	rodriguez.jpg 
+
+rodriguez.png:	rodriguez.pov
+	povray +A0.1 -W1920 -H1080 -Orodriguez.png rodriguez.pov
+
+rodriguez.jpg:	rodriguez.png 
+	convert -extract 1740x1070+135+10 rodriguez.png rodriguez.jpg
+
+commutator:	commutator.ini commutator.pov common.inc
+	povray +A0.1 -W1920 -H1080 -Oc/c.png commutator.ini
+jpg:
+	for f in c/c*.png; do convert $${f} c/`basename $${f} .png`.jpg; done
+
+
diff --git a/vorlesungen/slides/7/images/c/c01.jpg b/vorlesungen/slides/7/images/c/c01.jpg
new file mode 100644
index 0000000..b2dbdb2
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c01.jpg
diff --git a/vorlesungen/slides/7/images/c/c02.jpg b/vorlesungen/slides/7/images/c/c02.jpg
new file mode 100644
index 0000000..9b45ba3
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c02.jpg
diff --git a/vorlesungen/slides/7/images/c/c03.jpg b/vorlesungen/slides/7/images/c/c03.jpg
new file mode 100644
index 0000000..882be40
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c03.jpg
diff --git a/vorlesungen/slides/7/images/c/c04.jpg b/vorlesungen/slides/7/images/c/c04.jpg
new file mode 100644
index 0000000..5d26572
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c04.jpg
diff --git a/vorlesungen/slides/7/images/c/c05.jpg b/vorlesungen/slides/7/images/c/c05.jpg
new file mode 100644
index 0000000..458f565
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c05.jpg
diff --git a/vorlesungen/slides/7/images/c/c06.jpg b/vorlesungen/slides/7/images/c/c06.jpg
new file mode 100644
index 0000000..cd40cda
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c06.jpg
diff --git a/vorlesungen/slides/7/images/c/c07.jpg b/vorlesungen/slides/7/images/c/c07.jpg
new file mode 100644
index 0000000..3349795
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c07.jpg
diff --git a/vorlesungen/slides/7/images/c/c08.jpg b/vorlesungen/slides/7/images/c/c08.jpg
new file mode 100644
index 0000000..65048cf
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c08.jpg
diff --git a/vorlesungen/slides/7/images/c/c09.jpg b/vorlesungen/slides/7/images/c/c09.jpg
new file mode 100644
index 0000000..000d502
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c09.jpg
diff --git a/vorlesungen/slides/7/images/c/c10.jpg b/vorlesungen/slides/7/images/c/c10.jpg
new file mode 100644
index 0000000..064c96b
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c10.jpg
diff --git a/vorlesungen/slides/7/images/c/c11.jpg b/vorlesungen/slides/7/images/c/c11.jpg
new file mode 100644
index 0000000..c67bc5d
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c11.jpg
diff --git a/vorlesungen/slides/7/images/c/c12.jpg b/vorlesungen/slides/7/images/c/c12.jpg
new file mode 100644
index 0000000..f2174de
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c12.jpg
diff --git a/vorlesungen/slides/7/images/c/c13.jpg b/vorlesungen/slides/7/images/c/c13.jpg
new file mode 100644
index 0000000..3cb5ae6
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c13.jpg
diff --git a/vorlesungen/slides/7/images/c/c14.jpg b/vorlesungen/slides/7/images/c/c14.jpg
new file mode 100644
index 0000000..6985e4f
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c14.jpg
diff --git a/vorlesungen/slides/7/images/c/c15.jpg b/vorlesungen/slides/7/images/c/c15.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c16.jpg b/vorlesungen/slides/7/images/c/c16.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c17.jpg b/vorlesungen/slides/7/images/c/c17.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c18.jpg b/vorlesungen/slides/7/images/c/c18.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c19.jpg b/vorlesungen/slides/7/images/c/c19.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c20.jpg b/vorlesungen/slides/7/images/c/c20.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c21.jpg b/vorlesungen/slides/7/images/c/c21.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c22.jpg b/vorlesungen/slides/7/images/c/c22.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c23.jpg b/vorlesungen/slides/7/images/c/c23.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c24.jpg b/vorlesungen/slides/7/images/c/c24.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c25.jpg b/vorlesungen/slides/7/images/c/c25.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c26.jpg b/vorlesungen/slides/7/images/c/c26.jpg
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diff --git a/vorlesungen/slides/7/images/c/c27.jpg b/vorlesungen/slides/7/images/c/c27.jpg
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diff --git a/vorlesungen/slides/7/images/c/c28.jpg b/vorlesungen/slides/7/images/c/c28.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c29.jpg b/vorlesungen/slides/7/images/c/c29.jpg
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diff --git a/vorlesungen/slides/7/images/c/c30.jpg b/vorlesungen/slides/7/images/c/c30.jpg
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diff --git a/vorlesungen/slides/7/images/c/c31.jpg b/vorlesungen/slides/7/images/c/c31.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c32.jpg b/vorlesungen/slides/7/images/c/c32.jpg
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diff --git a/vorlesungen/slides/7/images/c/c33.jpg b/vorlesungen/slides/7/images/c/c33.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c34.jpg b/vorlesungen/slides/7/images/c/c34.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c35.jpg b/vorlesungen/slides/7/images/c/c35.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c36.jpg b/vorlesungen/slides/7/images/c/c36.jpg
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diff --git a/vorlesungen/slides/7/images/c/c37.jpg b/vorlesungen/slides/7/images/c/c37.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c38.jpg b/vorlesungen/slides/7/images/c/c38.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c39.jpg b/vorlesungen/slides/7/images/c/c39.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c40.jpg b/vorlesungen/slides/7/images/c/c40.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c41.jpg b/vorlesungen/slides/7/images/c/c41.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c42.jpg b/vorlesungen/slides/7/images/c/c42.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c43.jpg b/vorlesungen/slides/7/images/c/c43.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c44.jpg b/vorlesungen/slides/7/images/c/c44.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c45.jpg b/vorlesungen/slides/7/images/c/c45.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c46.jpg b/vorlesungen/slides/7/images/c/c46.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c47.jpg b/vorlesungen/slides/7/images/c/c47.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c48.jpg b/vorlesungen/slides/7/images/c/c48.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c49.jpg b/vorlesungen/slides/7/images/c/c49.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c50.jpg b/vorlesungen/slides/7/images/c/c50.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c51.jpg b/vorlesungen/slides/7/images/c/c51.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c52.jpg b/vorlesungen/slides/7/images/c/c52.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c53.jpg b/vorlesungen/slides/7/images/c/c53.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c54.jpg b/vorlesungen/slides/7/images/c/c54.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c55.jpg b/vorlesungen/slides/7/images/c/c55.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c56.jpg b/vorlesungen/slides/7/images/c/c56.jpg
new file mode 100644
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diff --git a/vorlesungen/slides/7/images/c/c57.jpg b/vorlesungen/slides/7/images/c/c57.jpg
new file mode 100644
index 0000000..9b61179
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+++ b/vorlesungen/slides/7/images/c/c57.jpg
diff --git a/vorlesungen/slides/7/images/c/c58.jpg b/vorlesungen/slides/7/images/c/c58.jpg
new file mode 100644
index 0000000..81d2173
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c58.jpg
diff --git a/vorlesungen/slides/7/images/c/c59.jpg b/vorlesungen/slides/7/images/c/c59.jpg
new file mode 100644
index 0000000..0ae9bac
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c59.jpg
diff --git a/vorlesungen/slides/7/images/c/c60.jpg b/vorlesungen/slides/7/images/c/c60.jpg
new file mode 100644
index 0000000..2bc77e7
--- /dev/null
+++ b/vorlesungen/slides/7/images/c/c60.jpg
diff --git a/vorlesungen/slides/7/images/common.inc b/vorlesungen/slides/7/images/common.inc
new file mode 100644
index 0000000..0e27c9a
--- /dev/null
+++ b/vorlesungen/slides/7/images/common.inc
@@ -0,0 +1,70 @@
+//
+// common.inc
+//
+// (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+//
+#version 3.7;
+#include "colors.inc"
+
+global_settings {
+	assumed_gamma 1
+}
+
+#declare imagescale = 0.025;
+#declare O = <0, 0, 0>;
+#declare at = 0.015;
+
+camera {
+	location <18, 15, -50>
+	look_at <0.0, 0.5, 0>
+	right 16/9 * x * imagescale
+	up y * imagescale
+}
+
+light_source {
+	<-40, 30, -50> 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, 1.1 * 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 l = 1.2;
+
+arrow(< -l,  0,  0 >, < l, 0, 0 >, at, White)
+arrow(<  0,  0, -l >, < 0, 0, l >, at, White)
+arrow(<  0, -l,  0 >, < 0, l, 0 >, at, White)
+
diff --git a/vorlesungen/slides/7/images/commutator.ini b/vorlesungen/slides/7/images/commutator.ini
new file mode 100644
index 0000000..8c2211e
--- /dev/null
+++ b/vorlesungen/slides/7/images/commutator.ini
@@ -0,0 +1,8 @@
+Input_File_Name=commutator.pov
+Initial_Frame=1
+Final_Frame=60
+Initial_Clock=1
+Final_Clock=60
+Cyclic_Animation=off
+Pause_when_Done=off
+
diff --git a/vorlesungen/slides/7/images/commutator.m b/vorlesungen/slides/7/images/commutator.m
new file mode 100644
index 0000000..5a448db
--- /dev/null
+++ b/vorlesungen/slides/7/images/commutator.m
@@ -0,0 +1,111 @@
+#
+# commutator.m
+#
+# (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+#
+
+X = [
+	0, 0,  0;
+	0, 0, -1;
+	0, 1,  0
+];
+
+Y = [
+	 0, 0, 1;
+	 0, 0, 0;
+	-1, 0, 0
+];
+
+Z = [
+	0, -1, 0;
+	1,  0, 0;
+	0,  0, 0
+];
+
+function retval = Dx(alpha)
+	retval = [
+		1, 0,           0         ;
+		0, cos(alpha), -sin(alpha);
+		0, sin(alpha),  cos(alpha)
+	];
+end
+
+function retval = Dy(beta)
+	retval = [
+		 cos(beta), 0, sin(beta);
+		 0,         1, 0        ;
+		-sin(beta), 0, cos(beta)
+	];
+end
+
+t = 0.9;
+P = Dx(t) * Dy(t)
+Q = Dy(t) * Dx(t)
+P - Q
+(P - Q) * [0;0;1]
+
+function	retval = kurven(filename, t)
+	retval = -1;
+	N = 20;
+	fn = fopen(filename, "w");
+	fprintf(fn, "//\n");
+	fprintf(fn, "// %s\n", filename);
+	fprintf(fn, "//\n");
+	fprintf(fn, "#macro XYkurve()\n");
+	for i = (0:N-1)
+		v1 = Dx(t * i / N) * [0;0;1];
+		v2 = Dx(t * (i+1) / N) * [0;0;1];
+		fprintf(fn, "sphere { <%.4f,%.4f,%.4f>, at }\n",
+			v1(1,1), v1(3,1), v1(2,1));
+		fprintf(fn, "cylinder { <%.4f,%.4f,%.4f>, <%.4f, %.4f, %.4f>, at }\n",
+			v1(1,1), v1(3,1), v1(2,1), v2(1,1), v2(3,1), v2(2,1));
+	end
+	for i = (0:N-1)
+		v1 = Dx(t) * Dy(t * i / N) * [0;0;1];
+		v2 = Dx(t) * Dy(t * (i+1) / N) * [0;0;1];
+		fprintf(fn, "sphere { <%.4f,%.4f,%.4f>, at }\n",
+			v1(1,1), v1(3,1), v1(2,1));
+		fprintf(fn, "cylinder { <%.4f,%.4f,%.4f>, <%.4f, %.4f, %.4f>, at }\n",
+			v1(1,1), v1(3,1), v1(2,1), v2(1,1), v2(3,1), v2(2,1));
+	end
+	fprintf(fn, "sphere { <%.4f,%.4f,%.4f>, at }\n",
+		v2(1,1), v2(3,1), v2(2,1));
+	fprintf(fn, "#end\n");
+	fprintf(fn, "#declare finalXY = <%.4f, %.4f, %.4f>;\n",
+		v2(1,1), v2(3,1), v2(2,1));
+	fprintf(fn, "#macro YXkurve()\n");
+	for i = (0:N-1)
+		v1 = Dy(t * i / N) * [0;0;1];
+		v2 = Dy(t * (i+1) / N) * [0;0;1];
+		fprintf(fn, "sphere { <%.4f,%.4f,%.4f>, at }\n",
+			v1(1,1), v1(3,1), v1(2,1));
+		fprintf(fn, "cylinder { <%.4f,%.4f,%.4f>, <%.4f, %.4f, %.4f>, at }\n",
+			v1(1,1), v1(3,1), v1(2,1), v2(1,1), v2(3,1), v2(2,1));
+	end
+	for i = (0:N-1)
+		v1 = Dy(t) * Dx(t * i / N) * [0;0;1];
+		v2 = Dy(t) * Dx(t * (i+1) / N) * [0;0;1];
+		fprintf(fn, "sphere { <%.4f,%.4f,%.4f>, at }\n",
+			v1(1,1), v1(3,1), v1(2,1));
+		fprintf(fn, "cylinder { <%.4f,%.4f,%.4f>, <%.4f, %.4f, %.4f>, at }\n",
+			v1(1,1), v1(3,1), v1(2,1), v2(1,1), v2(3,1), v2(2,1));
+	end
+	fprintf(fn, "sphere { <%.4f,%.4f,%.4f>, at }\n",
+		v2(1,1), v2(3,1), v2(2,1));
+	fprintf(fn, "#end\n");
+	fprintf(fn, "#declare finalYX = <%.4f, %.4f, %.4f>;\n",
+		v2(1,1), v2(3,1), v2(2,1));
+
+	fclose(fn);
+	retval = 0;
+end
+
+function	retval = kurve(i)
+	n = pi / 180;
+	filename = sprintf("f/%04d.inc", i);
+	kurven(filename, n * i);
+end
+
+for i = (1:60)
+	kurve(i);
+end
diff --git a/vorlesungen/slides/7/images/commutator.pov b/vorlesungen/slides/7/images/commutator.pov
new file mode 100644
index 0000000..9ae11b9
--- /dev/null
+++ b/vorlesungen/slides/7/images/commutator.pov
@@ -0,0 +1,59 @@
+//
+// commutator.pov
+//
+// (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+//
+#include "common.inc"
+
+sphere { O, 0.99
+	pigment {
+		color rgbt<1,1,1,0.5>
+	}
+	finish {
+		specular 0.9
+		metallic
+	}
+}
+
+#declare filename = concat("f/", str(clock, -4, 0), ".inc");
+
+#include filename
+
+#declare n1 = vcross(<0,1,0>, finalXY);
+#declare n2 = vcross(<0,1,0>, finalYX);
+
+intersection {
+	sphere { O, 1 }
+	plane { -n1, 0 }
+	plane { n2, 0 }
+	pigment {
+		color rgb<0,0.4,0.1>
+	}
+	finish {
+		specular 0.9
+		metallic
+	}
+}
+
+union {
+        XYkurve()
+        pigment {
+                color Red
+        }
+	finish {
+		specular 0.9
+		metallic
+	}
+}
+
+union {
+        YXkurve()
+        pigment {
+                color Blue
+        }
+	finish {
+		specular 0.9
+		metallic
+	}
+}
+
diff --git a/vorlesungen/slides/7/images/rodriguez.jpg b/vorlesungen/slides/7/images/rodriguez.jpg
new file mode 100644
index 0000000..5c49700
--- /dev/null
+++ b/vorlesungen/slides/7/images/rodriguez.jpg
diff --git a/vorlesungen/slides/7/images/rodriguez.png b/vorlesungen/slides/7/images/rodriguez.png
new file mode 100644
index 0000000..6d9e9e4
--- /dev/null
+++ b/vorlesungen/slides/7/images/rodriguez.png
diff --git a/vorlesungen/slides/7/images/rodriguez.pov b/vorlesungen/slides/7/images/rodriguez.pov
new file mode 100644
index 0000000..07aec19
--- /dev/null
+++ b/vorlesungen/slides/7/images/rodriguez.pov
@@ -0,0 +1,118 @@
+//
+// rodriguez.pov
+//
+// (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+//
+#version 3.7;
+#include "colors.inc"
+
+global_settings {
+	assumed_gamma 1
+}
+
+#declare imagescale = 0.020;
+#declare O = <0, 0, 0>;
+#declare at = 0.015;
+
+camera {
+	location <8, 15, -50>
+	look_at <0.1, 0.475, 0>
+	right 16/9 * x * imagescale
+	up y * imagescale
+}
+
+light_source {
+	<-4, 20, -50> 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, 1.1 * 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 K = vnormalize(<0.2,1,0.1>);
+#declare X = vnormalize(<1.1,1,-1.2>);
+#declare O = <0,0,0>;
+
+#declare r = vlength(vcross(K, X)) / vlength(K);
+
+#declare l = 1.0;
+
+arrow(< -l,  0,  0 >, < l, 0, 0 >, at, White)
+arrow(<  0,  0, -l >, < 0, 0, l >, at, White)
+arrow(<  0, -l,  0 >, < 0, l, 0 >, at, White)
+
+arrow(O, X, at, Red)
+arrow(O, K, at, Blue)
+
+#macro punkt(H,phi)
+	((H-vdot(K,H)*K)*cos(phi) + vcross(K,H)*sin(phi) + vdot(K,X)*K)
+#end
+
+cone { vdot(K, X) * K, r, O, 0
+	pigment {
+		color rgbt<0.6,0.6,0.6,0.5>
+	}
+	finish {
+		specular 0.9
+		metallic
+	}
+}
+
+
+union {
+	#declare phistep = pi / 100;
+	#declare phi = 0;
+	#while (phi < 2 * pi - phistep/2) 
+		sphere { punkt(K, phi), at/2 }
+		cylinder {
+			punkt(X, phi),
+			punkt(X, phi + phistep),
+			at/2
+		}
+		#declare phi = phi + phistep;
+	#end
+	pigment {
+		color Orange
+	}
+	finish {
+		specular 0.9
+		metallic
+	}
+}
+
+arrow(vdot(K,X)*K, punkt(X, 0), at, Yellow)
+#declare Darkgreen = rgb<0,0.5,0>;
+arrow(vdot(K,X)*K, punkt(X, pi/2), at, Darkgreen)
diff --git a/vorlesungen/slides/7/kommutator.tex b/vorlesungen/slides/7/kommutator.tex
new file mode 100644
index 0000000..84bf034
--- /dev/null
+++ b/vorlesungen/slides/7/kommutator.tex
@@ -0,0 +1,166 @@
+%
+% template.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{Kommutator in $\operatorname{SO}(3)$}
+\vspace{-20pt}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+\def\t{14.0cm}
+\ifthenelse{\boolean{presentation}}{
+\only<1>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c01.jpg}};}
+\only<2>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c02.jpg}};}
+\only<3>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c03.jpg}};}
+\only<4>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c04.jpg}};}
+\only<5>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c05.jpg}};}
+\only<6>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c06.jpg}};}
+\only<7>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c07.jpg}};}
+\only<8>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c08.jpg}};}
+\only<9>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c09.jpg}};}
+\only<10>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c10.jpg}};}
+\only<11>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c11.jpg}};}
+\only<12>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c12.jpg}};}
+\only<13>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c13.jpg}};}
+\only<14>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c14.jpg}};}
+\only<15>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c15.jpg}};}
+\only<16>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c16.jpg}};}
+\only<17>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c17.jpg}};}
+\only<18>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c18.jpg}};}
+\only<19>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c19.jpg}};}
+\only<20>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c20.jpg}};}
+\only<21>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c21.jpg}};}
+\only<22>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c22.jpg}};}
+\only<23>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c23.jpg}};}
+\only<24>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c24.jpg}};}
+\only<25>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c25.jpg}};}
+\only<26>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c26.jpg}};}
+\only<27>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c27.jpg}};}
+\only<28>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c28.jpg}};}
+\only<29>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c29.jpg}};}
+\only<30>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c30.jpg}};}
+\only<31>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c31.jpg}};}
+\only<32>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c32.jpg}};}
+\only<33>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c33.jpg}};}
+\only<34>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c34.jpg}};}
+\only<35>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c35.jpg}};}
+\only<36>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c36.jpg}};}
+\only<37>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c37.jpg}};}
+\only<38>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c38.jpg}};}
+\only<39>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c39.jpg}};}
+\only<40>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c40.jpg}};}
+\only<41>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c41.jpg}};}
+\only<42>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c42.jpg}};}
+\only<43>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c43.jpg}};}
+\only<44>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c44.jpg}};}
+\only<45>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c45.jpg}};}
+\only<46>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c46.jpg}};}
+\only<47>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c47.jpg}};}
+\only<48>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c48.jpg}};}
+\only<49>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c49.jpg}};}
+\only<50>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c50.jpg}};}
+\only<51>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c51.jpg}};}
+\only<52>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c52.jpg}};}
+\only<53>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c53.jpg}};}
+\only<54>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c54.jpg}};}
+\only<55>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c55.jpg}};}
+\only<56>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c56.jpg}};}
+\only<57>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c57.jpg}};}
+\only<58>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c58.jpg}};}
+\only<59>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c59.jpg}};}
+}{}
+\only<60>{\node at (0,0) {
+\includegraphics[width=\t]{../slides/7/images/c/c60.jpg}};}
+\coordinate (A) at (-0.3,3);
+\coordinate (B) at (-1.1,2);
+\coordinate (C) at (-2.1,-1.2);
+\draw[->,color=red,line width=1.4pt]
+	(A)
+	to[out=-143,in=60]
+	(B)
+	to[out=-120,in=80]
+	(C);
+%\fill[color=red] (B) circle[radius=0.08];
+\node[color=red] at (-1.2,1.5) [above left] {$D_{x,\alpha}$};
+\coordinate (D) at (0.3,3.2);
+\coordinate (E) at (1.8,2.8);
+\coordinate (F) at (5.2,-0.3);
+\draw[->,color=blue,line width=1.4pt]
+	(D)
+	to[out=-10,in=157]
+	(E)
+	to[out=-23,in=120]
+	(F);
+\fill[color=blue] (E) circle[radius=0.08];
+\node[color=blue] at (2.4,2.4) [above right] {$D_{y,\beta}$};
+\draw[->,color=darkgreen,line width=1.4pt]
+	(0.7,-3.1) to[out=1,in=-160] (3.9,-2.6);
+\node[color=darkgreen] at (2.5,-3.4) {$D_{z,\gamma}$};
+\end{tikzpicture}
+\end{center}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/kurven.tex b/vorlesungen/slides/7/kurven.tex
new file mode 100644
index 0000000..e0690eb
--- /dev/null
+++ b/vorlesungen/slides/7/kurven.tex
@@ -0,0 +1,104 @@
+%
+% kurven.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Kurven und Tangenten}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Kurven}
+Kurve in $\mathbb{R}^n$:
+\vspace{-12pt}
+\[
+\gamma
+\colon
+I=[a,b] \to \mathbb{R}^n
+:
+t\mapsto \gamma(t)
+\uncover<2->{
+=
+\begin{pmatrix}
+x_1(t)\\
+x_2(t)\\
+\vdots\\
+x_n(t)
+\end{pmatrix}
+}
+\]
+\vspace{-15pt}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+\coordinate (A) at (1,0.5);
+\coordinate (B) at (4,0.5);
+\coordinate (C) at (2,2.2);
+\coordinate (D) at (5,2);
+\coordinate (E) at ($(C)+(80:2)$);
+
+\draw[color=red,line width=1.4pt]
+	(A) to[in=-160] (B) to[out=20,in=-100] (C) to[out=80] (D);
+\fill[color=red] (C) circle[radius=0.06];
+\node[color=red] at (C) [left] {$\gamma(t)$};
+
+\uncover<4->{
+	\draw[->,color=blue,line width=1.4pt,shorten <= 0.06cm] (C) -- (E);
+	\node[color=blue] at (E) [right] {$\dot{\gamma}(t)$};
+}
+
+\uncover<2->{
+	\draw[->] (-0.1,0) -- (5.9,0) coordinate[label={$x_1$}];
+	\draw[->] (0,-0.1) -- (0,4.3) coordinate[label={right:$x_2$}];
+}
+\end{tikzpicture}
+\end{center}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<4->{%
+\begin{block}{Tangenten}
+Ableitung
+\[
+\frac{d}{dt}\gamma(t)
+=
+\dot{\gamma}(t)
+=
+\begin{pmatrix}
+\dot{x}_1(t)\\
+\dot{x}_2(t)\\
+\vdots\\
+\dot{x}_n(t)
+\end{pmatrix}
+\]
+\uncover<5->{%
+Lineare Approximation:
+\[
+\gamma(t+h)
+=
+\gamma(t)
++
+\dot{\gamma}(t) \cdot h
++
+o(h)
+\]}%
+\vspace{-10pt}
+\begin{itemize}
+\item<6->
+Sinnvoll, weil sowohl $\gamma(t)$ und $\dot{\gamma}(t)$
+in $\mathbb{R}^n$ liegen
+\item<7->
+Gilt auch für
+\[
+\operatorname{GL}_n(\mathbb{R})
+\uncover<8->{\subset M_n(\mathbb{R})}
+\uncover<9->{ = \mathbb{R}^{n\times n}}
+\]
+\end{itemize}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/liealgebra.tex b/vorlesungen/slides/7/liealgebra.tex
new file mode 100644
index 0000000..574467b
--- /dev/null
+++ b/vorlesungen/slides/7/liealgebra.tex
@@ -0,0 +1,85 @@
+%
+% liealgebra.tex -- Lie-Algebra
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Lie-Algebra}
+\ifthenelse{\boolean{presentation}}{\vspace{-15pt}}{\vspace{-8pt}}
+\begin{block}{Vektorraum}
+Tangentialvektoren im Punkt $I$:
+\begin{center}
+\begin{tabular}{>{$}c<{$}|p{6cm}|>{$}c<{$}}
+\text{Lie-Gruppe $G$}&Tangentialvektoren&\text{Lie-Algebra $LG$} \\
+\hline
+\uncover<2->{
+\operatorname{GL}_n(\mathbb{R})
+& beliebige Matrizen
+& M_n(\mathbb{R})
+}
+\\
+\uncover<3->{
+\operatorname{O(n)}
+& antisymmetrische Matrizen
+& \operatorname{o}(n)
+}
+\\
+\uncover<4->{
+\operatorname{SL}_n(\mathbb{R})
+& spurlose Matrizen
+& \operatorname{sl}_2(\mathbb{R})
+}
+\\
+\uncover<5->{
+\operatorname{U(n)}
+& antihermitesche Matrizen
+& \operatorname{u}(n)
+}
+\\
+\uncover<6->{
+\operatorname{SU(n)}
+& spurlose, antihermitesche Matrizen
+& \operatorname{su}(n)
+}
+\end{tabular}
+\end{center}
+\end{block}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.40\textwidth}
+\uncover<7->{%
+\begin{block}{Lie-Klammer}
+Kommutator: $[A,B] = AB-BA$
+\end{block}}
+\uncover<8->{%
+\begin{block}{Nachprüfen}
+$[A,B]\in LG$
+für $A,B\in LG$
+\end{block}}
+\end{column}
+\begin{column}{0.56\textwidth}
+\uncover<9->{%
+\begin{block}{Algebraische Eigenschaften}
+\begin{itemize}
+\item<10-> antisymmetrisch: $[A,B]=-[B,A]$
+\item<11-> Jacobi-Identität
+\[
+[A,[B,C]]+
+[B,[C,A]]+
+[C,[A,B]]
+= 0
+\]
+\end{itemize}
+\vspace{-13pt}
+\uncover<12->{%
+{\usebeamercolor[fg]{title}
+Beispiel:} $\mathbb{R}^3$ mit Vektorprodukt $\mathstrut = \operatorname{so}(3)$
+}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/mannigfaltigkeit.tex b/vorlesungen/slides/7/mannigfaltigkeit.tex
new file mode 100644
index 0000000..077dc9d
--- /dev/null
+++ b/vorlesungen/slides/7/mannigfaltigkeit.tex
@@ -0,0 +1,46 @@
+%
+% mannigfaltigkeit.tex -- Mannigfaltigkeit
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Mannigfaltigkeit}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{center}
+\includegraphics[width=\textwidth]{../../buch/chapters/60-gruppen/images/karten.pdf}
+\end{center}
+\end{column}
+\begin{column}{0.48\textwidth}
+\begin{block}{Definition}
+\begin{itemize}
+\item<2-> Karte: Abbildung $\varphi_\alpha\colon U_\alpha\to\mathbb{R}^n$
+\item<3-> differenzierbare Kartenwechsel: Koordinatenumrechnung im Überschneidungsgebiet
+\[
+\varphi_\beta\circ\varphi_\alpha^{-1}
+\colon
+\varphi_\alpha(U_\alpha\cap U_\beta)
+\to
+\varphi_\beta(U_\alpha\cap U_\beta)
+\]
+\item<4-> Atlas: Menge von Karten, die die ganze Mannigfaltigkeit überdecken
+\end{itemize}
+\end{block}
+\vspace{-7pt}
+\uncover<5->{%
+\begin{block}{Lokal$\mathstrut\cong\mathbb{R}^n$}
+Differenzierbare Mannigfaltigkeiten sehen lokal wie $\mathbb{R}^n$ aus
+\end{block}}
+\vspace{-3pt}
+\uncover<6->{%
+\begin{block}{Lie-Gruppe}
+Gruppe und Mannigfaltigkeit
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/parameter.tex b/vorlesungen/slides/7/parameter.tex
new file mode 100644
index 0000000..52c8e4a
--- /dev/null
+++ b/vorlesungen/slides/7/parameter.tex
@@ -0,0 +1,107 @@
+%
+% parameter.tex -- Parametrisierung der Matrizen
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\definecolor{darkgreen}{rgb}{0,0.6,0}
+\definecolor{darkyellow}{rgb}{1,0.8,0}
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Drehungen Parametrisieren}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.4\textwidth}
+\begin{block}{Drehung um Achsen}
+\vspace{-12pt}
+\begin{align*}
+\uncover<2->{
+D_{x,\alpha}
+&=
+\begin{pmatrix}
+1&0&0\\0&\cos\alpha&-\sin\alpha\\0&\sin\alpha&\cos\alpha
+\end{pmatrix}
+}
+\\
+\uncover<3->{
+D_{y,\beta}
+&=
+\begin{pmatrix}
+\cos\beta&0&\sin\beta\\0&1&0\\-\sin\beta&0&\cos\beta
+\end{pmatrix}
+}
+\\
+\uncover<4->{
+D_{z,\gamma}
+&=
+\begin{pmatrix}
+\cos\gamma&-\sin\gamma&0\\\sin\gamma&\cos\gamma&0\\0&0&1
+\end{pmatrix}
+}
+\intertext{\uncover<5->{beliebige Drehung:}}
+\uncover<5->{
+D
+&=
+D_{x,\alpha}
+D_{y,\beta}
+D_{z,\gamma}
+}
+\end{align*}
+\end{block}
+\end{column}
+\begin{column}{0.56\textwidth}
+\uncover<6->{%
+\begin{block}{Drehung um $\vec{\omega}\in\mathbb{R}^3$: 3-dimensional}
+\uncover<7->{%
+$\omega=|\vec{\omega}|=\mathstrut$Drehwinkel
+}
+\\
+\uncover<8->{%
+$\vec{k}=\vec{\omega}^0=\mathstrut$Drehachse
+}
+\[
+\uncover<9->{
+{\color{red}\vec{x}}
+\mapsto
+}
+\uncover<10->{
+({\color{darkyellow}\vec{x} -(\vec{k}\cdot\vec{x})\vec{k}})
+\cos\omega
++
+}
+\uncover<11->{
+({\color{darkgreen}\vec{x}\times\vec{k}}) \sin\omega
++
+}
+\uncover<9->{
+{\color{blue}\vec{k}} (\vec{k}\cdot\vec{x}) 
+}
+\]
+\vspace{-40pt}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+\uncover<9->{
+	\node at (0,0)
+		{\includegraphics[width=\textwidth]{../slides/7/images/rodriguez.jpg}};
+	\node[color=red] at (1.6,-0.9) {$\vec{x}$};
+	\node[color=blue] at (0.5,2) {$\vec{k}$};
+}
+\uncover<11->{
+	\node[color=darkgreen] at (-3,1.1) {$\vec{x}\times\vec{k}$};
+}
+\uncover<10->{
+	\node[color=yellow] at (2.2,-0.2)
+		{$\vec{x}-(\vec{x}\cdot\vec{k})\vec{k}$};
+}
+\end{tikzpicture}
+\end{center}
+\end{block}}
+\end{column}
+\end{columns}
+\vspace{-15pt}
+\uncover<5->{%
+{\usebeamercolor[fg]{title}Dimension:} $\operatorname{SO}(3)$ ist eine
+dreidimensionale Gruppe}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/semi.tex b/vorlesungen/slides/7/semi.tex
new file mode 100644
index 0000000..66b8d27
--- /dev/null
+++ b/vorlesungen/slides/7/semi.tex
@@ -0,0 +1,117 @@
+%
+% semi.tex -- Beispiele: semidirekte Produkte
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Drehung/Skalierung und Verschiebung}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Skalierung und Verschiebung}
+Gruppe $G=\{(e^s,t)\;|\;s,t\in\mathbb{R}\}$
+\\
+Wirkung auf $\mathbb{R}$:
+\[
+x\mapsto \underbrace{e^s\cdot x}_{\text{Skalierung}} \mathstrut+ t
+\]
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<2->{%
+\begin{block}{Drehung und Verschiebung}
+Gruppe
+$G=
+\{ (\alpha,\vec{t})
+\;|\;
+\alpha\in\mathbb{R},\vec{t}\in\mathbb{R}^2
+\}$
+Wirkung auf $\mathbb{R}^2$:
+\[
+\vec{x}\mapsto \underbrace{D_\alpha \vec{x}}_{\text{Drehung}} \mathstrut+ \vec{t}
+\]
+\end{block}}
+\end{column}
+\end{columns}
+\vspace{-15pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\uncover<3->{%
+\begin{block}{Verknüpfung}
+\vspace{-15pt}
+\begin{align*}
+(e^{s_1},t_1)(e^{s_2},t_2)x
+&\uncover<4->{=
+(e^{s_1},t_1)(e^{s_2}x+t_2)}
+\\
+&\uncover<5->{=
+e^{s_1+s_2}x + e^{s_1}t_2+t_1}
+\\
+\uncover<6->{
+(e^{s_1},t_1)(e^{s_2},t_2)
+&=
+(e^{s_1}e^{s_2},t_1+e^{s_1}t_2)}
+\end{align*}
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<7->{%
+\begin{block}{Verknüpfung}
+\vspace{-15pt}
+\begin{align*}
+(\alpha_1,\vec{t}_1)
+(\alpha_2,\vec{t}_2)
+\vec{x}
+&\uncover<8->{=
+(\alpha_1,\vec{t}_1)(D_{\alpha_2}\vec{x}+\vec{t}_2)}
+\\
+&\uncover<9->{=D_{\alpha_1+\alpha_2}\vec{x} + D_{\alpha_1}\vec{t}_2+\vec{t}_1}
+\\
+\uncover<10->{
+(\alpha_1,\vec{t}_1)
+(\alpha_2,\vec{t}_2)
+&=
+(\alpha_1+\alpha_2, D_{\alpha_1}\vec{t}_2+\vec{t}_1)
+}
+\end{align*}
+\end{block}}
+\end{column}
+\end{columns}
+\vspace{-10pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\uncover<11->{%
+\begin{block}{Matrixschreibweise}
+\vspace{-12pt}
+\[
+g=(e^s,t) =
+\begin{pmatrix}
+e^s&t\\
+0&1
+\end{pmatrix}
+\quad\text{auf}\quad
+\begin{pmatrix}x\\1\end{pmatrix}
+\]
+\end{block}}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<12->{%
+\begin{block}{Matrixschreibweise}
+\vspace{-12pt}
+\[
+g=(\alpha,\vec{t}) =
+\begin{pmatrix}
+D_{\alpha}&\vec{t}\\
+0&1
+\end{pmatrix}
+\quad\text{auf}\quad
+\begin{pmatrix}\vec{x}\\1\end{pmatrix}
+\]
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/sl2.tex b/vorlesungen/slides/7/sl2.tex
new file mode 100644
index 0000000..a65b4f6
--- /dev/null
+++ b/vorlesungen/slides/7/sl2.tex
@@ -0,0 +1,242 @@
+%
+% sl2.tex -- Beispiel: Parametrisierung von SL_2(R)
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t,fragile]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{$\operatorname{SL}_2(\mathbb{R})\subset\operatorname{GL}_n(\mathbb{R})$}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.44\textwidth}
+\begin{block}{Determinante}
+\[
+A=\begin{pmatrix}
+a&b\\
+c&d
+\end{pmatrix}
+\;\Rightarrow\;
+\det A = ad-bc
+\]
+\end{block}
+\end{column}
+\begin{column}{0.52\textwidth}
+\begin{block}{Dimension}
+\[
+4\; \text{Variablen}
+-
+1\; \text{Bedingung}
+=
+3\; \text{Dimensionen}
+\]
+\end{block}
+\end{column}
+\end{columns}
+\vspace{-10pt}
+\uncover<3->{%
+\begin{columns}[t,onlytextwidth]
+\def\s{0.94}
+\begin{column}{0.33\textwidth}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick,scale=\s]
+\begin{scope}
+	\clip (-2.1,-2.1) rectangle (2.3,2.3);
+	\fill[color=blue!20] (-1,-1) rectangle (1,1);
+	\foreach \x in {-2,...,2}{
+		\draw[color=blue,line width=0.3pt] (\x,-3) -- (\x,3);
+	}
+	\foreach \y in {-2,...,2}{
+		\draw[color=blue,line width=0.3pt] (-3,\y) -- (3,\y);
+	}
+	\ifthenelse{\boolean{presentation}}{
+	\foreach \d in {4,...,10}{
+		\only<\d>{
+			\pgfmathparse{1+(\d-4)/10}
+			\xdef\t{\pgfmathresult}
+			\fill[color=red!40,opacity=0.5]
+				({-\t},{-1/\t}) rectangle (\t,{1/\t});
+			\foreach \x in {-2,...,2}{
+				\draw[color=red,line width=0.3pt]
+					({\x*\t},-3) -- ({\x*\t},3);
+			}
+			\foreach \y in {-3,...,3}{
+				\draw[color=red,line width=0.3pt]
+				(-3,{\y/\t}) -- (3,{\y/\t});
+			}
+		}
+	}
+	}{}
+	\uncover<11->{
+		\xdef\t{1.6}
+		\fill[color=red!40,opacity=0.5]
+			({-\t},{-1/\t}) rectangle (\t,{1/\t});
+		\foreach \x in {-2,...,2}{
+			\draw[color=red,line width=0.3pt]
+				({\x*\t},-3) -- ({\x*\t},3);
+		}
+		\foreach \y in {-3,...,3}{
+			\draw[color=red,line width=0.3pt]
+			(-3,{\y/\t}) -- (3,{\y/\t});
+		}
+	}
+\end{scope}
+\draw[->] (-2.1,0) -- (2.3,0) coordinate[label={$x$}];
+\draw[->] (0,-2.1) -- (0,2.3) coordinate[label={right:$y$}];
+\uncover<3->{%
+	\fill[color=white,opacity=0.8] (-1.5,-2.8) rectangle (1.5,-1.3);
+	\node at (0,-2.1) {$
+	D
+	=
+	\begin{pmatrix} e^t & 0 \\ 0 & e^{-t} \end{pmatrix}
+	$};
+}
+\end{tikzpicture}
+\end{center}
+\end{column}
+\begin{column}{0.33\textwidth}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick,scale=\s]
+\fill[color=blue!20] (-1,-1) rectangle (1,1);
+\begin{scope}
+	\clip (-2.1,-2.1) rectangle (2.3,2.3);
+	\foreach \x in {-2,...,2}{
+		\draw[color=blue,line width=0.3pt] (\x,-3) -- (\x,3);
+	}
+	\foreach \y in {-2,...,2}{
+		\draw[color=blue,line width=0.3pt] (-3,\y) -- (3,\y);
+	}
+	\ifthenelse{\boolean{presentation}}{
+	\foreach \d in {11,...,17}{
+		\only<\d>{
+			\pgfmathparse{(\d-11)/10}
+			\xdef\t{\pgfmathresult}
+			\fill[color=red!40,opacity=0.5]
+				({-1+\t*(-1)},{-1})
+				--
+				({1+\t*(-1)},{-1})
+				--
+				({1+\t},{1})
+				--
+				({-1+\t},{1})
+				-- cycle;
+			\foreach \x in {-3,...,3}{
+				\draw[color=red,line width=0.3pt]
+					({\x+\t*(-3)},-3) -- ({\x+\t*(3)},3);
+			}
+			\foreach \y in {-3,...,3}{
+				\draw[color=red,line width=0.3pt]
+					({-3+\t*\y},\y) -- ({3+\t*\y},\y);
+			}
+		}
+	}
+	}{}
+	\uncover<18->{
+		\xdef\t{0.6}
+		\fill[color=red!40,opacity=0.5]
+			({-1+\t*(-1)},{-1})
+			--
+			({1+\t*(-1)},{-1})
+			--
+			({1+\t},{1})
+			--
+			({-1+\t},{1})
+			-- cycle;
+		\foreach \x in {-3,...,3}{
+			\draw[color=red,line width=0.3pt]
+				({\x+\t*(-3)},-3) -- ({\x+\t*(3)},3);
+		}
+		\foreach \y in {-3,...,3}{
+			\draw[color=red,line width=0.3pt]
+				({-3+\t*\y},\y) -- ({3+\t*\y},\y);
+		}
+	}
+\end{scope}
+\draw[->] (-2.1,0) -- (2.3,0) coordinate[label={$x$}];
+\draw[->] (0,-2.1) -- (0,2.3) coordinate[label={right:$y$}];
+\uncover<11->{
+	\fill[color=white,opacity=0.8] (-1.5,-2.8) rectangle (1.5,-1.3);
+	\node at (0,-2.1) {$
+	S
+	=
+	\begin{pmatrix} 1&s\\ 0&1\end{pmatrix}
+	$};
+}
+\end{tikzpicture}
+\end{center}
+\end{column}
+\begin{column}{0.33\textwidth}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick,scale=\s]
+\fill[color=blue!20] (-1,-1) rectangle (1,1);
+\begin{scope}
+	\clip (-2.1,-2.1) rectangle (2.3,2.3);
+	\foreach \x in {-2,...,2}{
+		\draw[color=blue,line width=0.3pt] (\x,-3) -- (\x,3);
+	}
+	\foreach \y in {-2,...,2}{
+		\draw[color=blue,line width=0.3pt] (-3,\y) -- (3,\y);
+	}
+	\ifthenelse{\boolean{presentation}}{
+	\foreach \d in {18,...,24}{
+		\only<\d>{
+			\pgfmathparse{(\d-18)/10}
+			\xdef\t{\pgfmathresult}
+			\fill[color=red!40,opacity=0.5]
+				(-1,{\t*(-1)-1})
+				--
+				(1,{\t*1-1})
+				--
+				(1,{\t*1+1})
+				--
+				(-1,{\t*(-1)+1})
+				-- cycle;
+			\foreach \x in {-3,...,3}{
+				\draw[color=red,line width=0.3pt]
+					(\x,{\x*\t-3}) -- (\x,{\x*\t+3});
+			}
+			\foreach \y in {-3,...,3}{
+				\draw[color=red,line width=0.3pt]
+					(-3,{-3*\t+\y}) -- (3,{3*\t+\y});
+			}
+		}
+	}
+	}{}
+	\uncover<25->{
+		\xdef\t{0.6}
+		\fill[color=red!40,opacity=0.5]
+			(-1,{\t*(-1)-1})
+			--
+			(1,{\t*1-1})
+			--
+			(1,{\t*1+1})
+			--
+			(-1,{\t*(-1)+1})
+			-- cycle;
+		\foreach \x in {-3,...,3}{
+			\draw[color=red,line width=0.3pt]
+				(\x,{\x*\t-3}) -- (\x,{\x*\t+3});
+		}
+		\foreach \y in {-3,...,3}{
+			\draw[color=red,line width=0.3pt]
+				(-3,{-3*\t+\y}) -- (3,{3*\t+\y});
+		}
+	}
+\end{scope}
+\draw[->] (-2.1,0) -- (2.3,0) coordinate[label={$x$}];
+\draw[->] (0,-2.1) -- (0,2.3) coordinate[label={right:$y$}];
+\uncover<18->{%
+\fill[color=white,opacity=0.8] (-1.5,-2.8) rectangle (1.5,-1.3);
+	\node at (0,-2.1) {$
+	T
+	=
+	\begin{pmatrix} 1&0\\t&1\end{pmatrix}
+	$};
+}
+\end{tikzpicture}
+\end{center}
+\end{column}
+\end{columns}}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/7/symmetrien.tex b/vorlesungen/slides/7/symmetrien.tex
new file mode 100644
index 0000000..35d62d8
--- /dev/null
+++ b/vorlesungen/slides/7/symmetrien.tex
@@ -0,0 +1,145 @@
+%
+% symmetrien.tex -- Symmetrien
+%
+% (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{Symmetrien}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.48\textwidth}
+\begin{block}{Diskrete Symmetrien}
+\begin{itemize}
+\item<2->
+Ebenen-Spiegelung:
+\[
+{\tiny
+\begin{pmatrix*}[r] x_1\\x_2\\x_3 \end{pmatrix*}
+}
+\mapsto
+{\tiny
+\begin{pmatrix*}[r]-x_1\\x_2\\x_3 \end{pmatrix*}
+}
+\uncover<4->{\!,\;
+\vec{x}
+\mapsto
+\vec{x} -2 (\vec{n}\cdot\vec{x}) \vec{n}
+}
+\]
+\vspace{-10pt}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+\def\a{10}
+\def\b{50}
+\def\r{2}
+\coordinate (O) at (0,0);
+\coordinate (A) at (\b:\r);
+\coordinate (B) at ({180+2*\a-\b}:\r);
+\coordinate (C) at ({90+\a}:{\r*cos(90+\a-\b)});
+\coordinate (N) at (\a:2);
+\coordinate (D) at (\a:{\r*cos(\b-\a)});
+\uncover<3->{
+\clip (-2.5,-0.45) rectangle (2.5,1.95);
+
+	\fill[color=darkgreen!20] (O) -- ({\a-90}:0.2) arc ({\a-90}:\a:0.2)
+		-- cycle;
+	\draw[->,color=darkgreen] (O) -- (N);
+	\node[color=darkgreen] at (N) [above] {$\vec{n}$};
+
+
+	\fill[color=blue!20] (C) -- ($(C)+(\a:0.2)$) arc (\a:{90+\a}:0.2)
+		-- cycle;
+	\fill[color=red] (O) circle[radius=0.06];
+	\draw[color=red] ({\a-90}:2) -- ({\a+90}:2);
+	\fill[color=blue] (C) circle[radius=0.06];
+	\draw[color=blue,line width=0.1pt] (A) -- (D);
+	\node[color=darkgreen] at (D) [below,rotate=\a]
+		{$(\vec{n}\cdot\vec{x})\vec{n}$};
+	\draw[color=blue,line width=0.5pt] (A)--(B);
+
+	\node[color=blue] at (A) [above right] {$\vec{x}$};
+	\node[color=blue] at (B) [above left] {$\vec{x}'$};
+
+	\node[color=red] at (O) [below left] {$O$};
+
+	\draw[->,color=blue,shorten <= 0.06cm,line width=1.4pt] (O) -- (A);
+	\draw[->,color=blue,shorten <= 0.06cm,line width=1.4pt] (O) -- (B);
+}
+
+\end{tikzpicture}
+\end{center}
+\vspace{-5pt}
+$\vec{n}$ ein Einheitsnormalenvektor auf der Ebene, $|\vec{n}|=1$
+\item<5->
+Punkt-Spiegelung:
+\[
+{\tiny
+\begin{pmatrix*}[r] x_1\\x_2\\x_3 \end{pmatrix*}
+}
+\mapsto
+-
+{\tiny
+\begin{pmatrix*}[r]x_1\\x_2\\x_3 \end{pmatrix*}
+}
+\]
+\end{itemize}
+\end{block}
+\end{column}
+\begin{column}{0.48\textwidth}
+\uncover<6->{%
+\begin{block}{Kontinuierliche Symmetrien}
+\begin{itemize}
+\item<7-> Translation:
+\(
+\vec{x} \mapsto \vec{x} + \vec{t}
+\)
+\item<8-> Drehung:
+\vspace{-3pt}
+\begin{center}
+\begin{tikzpicture}[>=latex,thick]
+\def\a{25}
+\def\r{1.3}
+\coordinate (O) at (0,0);
+\begin{scope}
+\clip (-1.1,-0.1) rectangle (2.3,2.3);
+\draw[color=red] (O) circle[radius=2];
+\fill[color=blue!20] (O) -- (0:\r) arc (0:\a:\r) -- cycle;
+\fill[color=blue!20] (O) -- (90:\r) arc (90:{90+\a}:\r) -- cycle;
+\node at ({0.5*\a}:1) {$\alpha$};
+\node at ({90+0.5*\a}:1) {$\alpha$};
+\draw[->,color=blue,line width=1.4pt] (O) -- (\a:2);
+\draw[->,color=darkgreen,line width=1.4pt] (O) -- ({90+\a}:2);
+\end{scope}
+\draw[->] (-1.1,0) -- (2.3,0) coordinate[label={$x$}];
+\draw[->] (0,-0.1) -- (0,2.3) coordinate[label={right:$y$}];
+\end{tikzpicture}
+\end{center}
+\[
+\uncover<9->{%
+\begin{pmatrix}x\\y\end{pmatrix}
+\mapsto
+\begin{pmatrix}
+{\color{blue}\cos\alpha}&{\color{darkgreen}-\sin\alpha}\\
+{\color{blue}\sin\alpha}&{\color{darkgreen}\phantom{-}\cos\alpha}
+\end{pmatrix}
+\begin{pmatrix}x\\y\end{pmatrix}
+}
+\]
+\end{itemize}
+\end{block}}
+\vspace{-10pt}
+\uncover<10->{%
+\begin{block}{Definition}
+Längen/Winkel bleiben erhalten
+\\
+\uncover<11->{%
+$\Rightarrow$ $\exists$ Erhaltungsgrösse}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup
diff --git a/vorlesungen/slides/Makefile.inc b/vorlesungen/slides/Makefile.inc
index 4bf9348..e2271b8 100644
--- a/vorlesungen/slides/Makefile.inc
+++ b/vorlesungen/slides/Makefile.inc
@@ -9,9 +9,10 @@ include ../slides/2/Makefile.inc
 include ../slides/3/Makefile.inc
 include ../slides/4/Makefile.inc
 include ../slides/5/Makefile.inc
+include ../slides/7/Makefile.inc
 include ../slides/8/Makefile.inc
 include ../slides/9/Makefile.inc
 
 slides = 								\
 	$(chapter0) $(chapter1) $(chapter2) $(chapter3) $(chapter4)	\
-	$(chapter5) $(chapter8) $(chapter9)
+	$(chapter5) $(chapter7) $(chapter8) $(chapter9)
diff --git a/vorlesungen/slides/test.tex b/vorlesungen/slides/test.tex
index 5bdec4f..4673f76 100644
--- a/vorlesungen/slides/test.tex
+++ b/vorlesungen/slides/test.tex
@@ -1,49 +1,39 @@
 %
 % test.tex collection of all slides
 %
-% (c) 2019 Prof Dr Andreas Müller, Hochschule Rapperswil
+% (c) 2021 Prof Dr Andreas Müller, Hochschule Rapperswil
 %
-%\folie{5/verzerrung.tex}
-%\folie{5/plan.tex}
-%\folie{5/planbeispiele.tex}
-%\folie{5/approximation.tex}
- 
-% XXX Visualisierung Cayley-Hamilton-Produkte
-% XXX \folie{5/chvisual.tex}
 
-% XXX stone weierstrass incomplete
-%\folie{5/stoneweierstrass.tex}
-%\folie{5/swbeweis.tex}
-
-% XXX polynome auf dem spektrum
-% XXX Motiviation für *-Operation
-%\folie{5/normal.tex}
-%\folie{5/normalbeispiel34.tex}
-
-
-\section{Körpererweiterungen}
-% XXX Was ist eine Körpererweiterung 
-%\folie{4/galois/erweiterung.tex}
-
-\section{Galois-Gruppe}
-% XXX Übersetzung Körpererweiterungsstruktur in eine Gruppe
-%\folie{4/galois/automorphismus.tex}
-
-\section{Geometrische Anwendungen}
-% XXX Geometrische Konstruktionen
-\folie{4/galois/konstruktion.tex}
-% XXX Verdoppelung des Würfels
-%\folie{4/galois/wuerfel.tex}
-% XXX Dreiteilung des Winkels
-%\folie{4/galois/winkeldreiteilung.tex}
-% XXX Quadratur des Kreises
-%\folie{4/galois/quadratur.tex}
-
-\section{Lösbarkeit durch Radikale}
-% XXX Wurzelformeln mit Radikalen
-%\folie{4/galois/radikale.tex}
-% XXX Auflösbarkeit einer Gruppe
-%\folie{4/galois/aufloesbarkeit.tex}
-% XXX S_n ist nicht auflösbar
-%\folie{4/galois/sn.tex}
+\section{Matrizen-Gruppen}
+% Was sind Symmetrien
+%\folie{7/symmetrien.tex}
+% Algebraische Bedingungen für Matrixgruppen
+%\folie{7/algebraisch.tex}
+% Parametrisierung, Beispiel SO(3)
+%\folie{7/parameter.tex}
+% Mannigfaltigkeiten
+%\folie{7/mannigfaltigkeit.tex}
+% Weitere Beispiele
+% SL_2(R)
+%\folie{7/sl2.tex}
+\folie{7/drehung.tex}
+%\folie{7/drehanim.tex}
+% Semidirekte Produkte SO(2) x R^2, R^+ x R
+%\folie{7/semi.tex}
+
+\section{Ableitungen}
+% Kurven in einer Gruppe
+%\folie{7/kurven.tex}
+% Einparameter-Gruppen
+%\folie{7/einparameter.tex}
+% Ableitung einer Einparameter-Gruppe
+%\folie{7/ableitung.tex}
+% Lie-Algebra
+%\folie{7/liealgebra.tex}
+% Kommutator
+%\folie{7/kommutator.tex}
+
+\section{Exponentialabbildung}
+% Differentialgleichung für die Exponentialabbildung
+%\folie{7/dg.tex}
 
diff --git a/vorlesungen/stream/background.png b/vorlesungen/stream/background.png
new file mode 100644
index 0000000..6cd215d
--- /dev/null
+++ b/vorlesungen/stream/background.png
diff --git a/vorlesungen/stream/background2.png b/vorlesungen/stream/background2.png
new file mode 100644
index 0000000..43f8484
--- /dev/null
+++ b/vorlesungen/stream/background2.png