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25 lines
965 B
TeX
25 lines
965 B
TeX
\begin{tikzpicture}
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\tikzstyle{point}=[circle,thick,draw=black,fill=black,inner sep=0pt,minimum width=2pt,minimum height=2pt]
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\draw (0,0) ellipse (2cm and 1cm);
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\def\ringa{(-0.3,0) circle (0.5cm)}
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\def\ringb{(+0.3,0) circle (0.5cm)}
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\draw \ringa;
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\draw[red] \ringb;
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%\node at (-1,0.3) {$U_i$};
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%\node at (+1,0.3) {$U_j$};
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\node at (-1.9,-2) {$U_i$};
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\node[red] at (+1.9,-2) {$U_j$};
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\node at (+2.0,0.7) {$S$};
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\node[point,label={[label distance=-0.1cm]90:$s$}] at (0,0) {};
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\path[<-] (-0.35,0) edge [bend angle=10,bend right] node[label={[label distance=0.1cm]210:$F_i$}] {} (-1,-1.5);
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\path[<-,red] (+0.35,0) edge [bend angle=10,bend left] node[label={[label distance=0.1cm]-30:$F_j$}] {} (+1,-1.5);
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\draw (-1,-2) circle (0.5cm);
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\draw[red] (+1,-2) circle (0.5cm);
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\path[->, green, thick] (-0.3,-2) edge node[label=below:$\scriptstyle F_j^{-1} \circ F_i$] {} (0.3,-2);
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\end{tikzpicture}
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