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Diffstat (limited to 'vorlesungen/slides/4/galois/aufloesbarkeit.tex')
-rw-r--r-- | vorlesungen/slides/4/galois/aufloesbarkeit.tex | 240 |
1 files changed, 120 insertions, 120 deletions
diff --git a/vorlesungen/slides/4/galois/aufloesbarkeit.tex b/vorlesungen/slides/4/galois/aufloesbarkeit.tex index ef5902b..3d52b00 100644 --- a/vorlesungen/slides/4/galois/aufloesbarkeit.tex +++ b/vorlesungen/slides/4/galois/aufloesbarkeit.tex @@ -1,120 +1,120 @@ -% -% aufloesbarkeit.tex -% -% (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} +%
+% aufloesbarkeit.tex
+%
+% (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}
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