diff options
author | Reto <reto.fritsche@ost.ch> | 2021-04-24 14:11:30 +0200 |
---|---|---|
committer | Reto <reto.fritsche@ost.ch> | 2021-04-24 14:11:30 +0200 |
commit | d1a34332748bad563209adafbf3a32f3b6ed8f87 (patch) | |
tree | f4a6e7c4b71500aa588cf626d19439729a38824a /vorlesungen/slides/6/punktgruppen/ebene.tex | |
parent | added simple code example of mceliece cryptosystem (diff) | |
parent | add title slides for presentations (diff) | |
download | SeminarMatrizen-d1a34332748bad563209adafbf3a32f3b6ed8f87.tar.gz SeminarMatrizen-d1a34332748bad563209adafbf3a32f3b6ed8f87.zip |
Merge remote-tracking branch 'upstream/master' into mceliece
Diffstat (limited to '')
-rw-r--r-- | vorlesungen/slides/6/punktgruppen/ebene.tex | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/vorlesungen/slides/6/punktgruppen/ebene.tex b/vorlesungen/slides/6/punktgruppen/ebene.tex new file mode 100644 index 0000000..3b715e4 --- /dev/null +++ b/vorlesungen/slides/6/punktgruppen/ebene.tex @@ -0,0 +1,79 @@ +% +% ebene.tex -- Punktgruppen in der Ebene +% +% (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule +% +\bgroup +\begin{frame}[t] +\setlength{\abovedisplayskip}{5pt} +\setlength{\belowdisplayskip}{5pt} +\frametitle{Punktgruppen in der Ebene} +\vspace{-20pt} +\begin{columns}[t,onlytextwidth] +\begin{column}{0.48\textwidth} +\begin{block}{Zyklische Gruppen} +\begin{center} +\begin{tikzpicture}[>=latex,thick] +\def\a{40} +\def\r{2} +\def\R{2.5} +\fill[color=blue!20] (0,0) -- (0:{1.1*\R}) arc (0:\a:{1.1*\R}) -- cycle; +\node[color=blue] at ({0.5*\a}:{0.8*\r}) {$\displaystyle\frac{2\pi}n$}; +\fill (0,0) circle[radius=0.08]; +\draw[color=red] (0:\r) -- (0:\R) + -- ({1*\a}:\r) -- ({1*\a}:\R) + -- ({2*\a}:\r) -- ({2*\a}:\R) + -- ({3*\a}:\r) -- ({3*\a}:\R) + -- ({4*\a}:\r) -- ({4*\a}:\R) + -- ({5*\a}:\r) -- ({5*\a}:\R) + -- ({6*\a}:\r) -- ({6*\a}:\R) + -- ({7*\a}:\r) -- ({7*\a}:\R) + -- ({8*\a}:\r) %-- ({8*\a}:\R) +; +\end{tikzpicture} +\end{center} +\[ +C_n += +\{\text{Drehungen um Winkel $2\pi/n$}\} +\] +\end{block} +\end{column} +\begin{column}{0.48\textwidth} +\begin{block}{Diedergruppen} +\begin{center} +\begin{tikzpicture}[>=latex,thick] +\def\a{40} +\def\r{2} +\def\R{2.5} +\fill[color=blue!20] (0,0) -- (0:{1.1*\R}) arc (0:\a:{1.1*\R}) -- cycle; +\node[color=blue] at ({0.5*\a}:{0.8*\r}) {$\displaystyle\frac{2\pi}n$}; +\fill (0,0) circle[radius=0.08]; +\draw[color=red] (0:\r) -- ({0.5*\a}:\R) + -- ({1*\a}:\r) -- ({1.5*\a}:\R) + -- ({2*\a}:\r) -- ({2.5*\a}:\R) + -- ({3*\a}:\r) -- ({3.5*\a}:\R) + -- ({4*\a}:\r) -- ({4.5*\a}:\R) + -- ({5*\a}:\r) -- ({5.5*\a}:\R) + -- ({6*\a}:\r) -- ({6.5*\a}:\R) + -- ({7*\a}:\r) -- ({7.5*\a}:\R) + -- ({8*\a}:\r) %-- ({8.5*\a}:\R) +; +\end{tikzpicture} +\end{center} +\begin{align*} +D_n +&= +\langle\text{Spiegelung}, +\text{Drehungen}\rangle +\\ +&= +C_2 +\ltimes +C_n +\end{align*} +\end{block} +\end{column} +\end{columns} +\end{frame} +\egroup |