Merge branch 'AndreasFMueller:master' into master

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diff --git a/vorlesungen/slides/dreieck/beta.tex b/vorlesungen/slides/dreieck/beta.tex
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+%
+% beta.tex -- slide template
+%
+% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
+%
+\bgroup
+\begin{frame}[t]
+\setlength{\abovedisplayskip}{5pt}
+\setlength{\belowdisplayskip}{5pt}
+\frametitle{Beta-Verteilung}
+\vspace{-20pt}
+\begin{columns}[t,onlytextwidth]
+\begin{column}{0.40\textwidth}
+\begin{block}{Ordnungsstatistik}
+\begin{align*}
+\varphi(x)
+&=
+{\color{blue}N} x^{k-1} (1-x)^{n-k}
+\\
+&\uncover<8->{
+=
+\beta_{k,n-k+1}(x)
+}
+\end{align*}
+\end{block}
+\uncover<8->{%
+\begin{block}{Risch-Algorithmus}
+Die Beta-Verteilungen haben ausser in Spezialfällen
+keine Stammfunktion in geschlossener Form.
+\end{block}}
+\end{column}
+\begin{column}{0.56\textwidth}
+\uncover<2->{%
+\begin{definition}
+Beta-Verteilung
+\[
+\beta_{a,b}(x)
+=
+\begin{cases}
+\displaystyle
+\uncover<7->{
+{\color{blue}
+\frac{1}{B(a,b)}
+}
+}
+x^{a-1}(1-x)^{b-1}
+&0\le x\le 1
+\\
+0&\text{sonst}
+\end{cases}
+\]
+\end{definition}}
+\uncover<3->{%
+\begin{block}{Normierung}
+\begin{align*}
+{\color{blue}\frac{1}{{N}}}
+&\uncover<4->{=
+\int_{-\infty}^\infty \beta_{a,b}(x)\,dx}
+\\
+&\uncover<5->{=
+\int_{0}^1 x^{a-1}(1-x)^{b-1}\,dx}
+\\
+&\uncover<6->{=
+B(a,b)}
+\end{align*}
+\end{block}}
+\end{column}
+\end{columns}
+\end{frame}
+\egroup