LaTeX-examples/documents/GeoTopo/figures/topology-kartenwechsel.tex

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        \draw[->] (0,0) -- (0,1.5);
        \draw[->] (0,0) -- (1.5,0);
        \node at (0.3,0.16) {$\mathbb{R}^n$};
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    \begin{scope}[xshift=0.4cm,yshift=-2.8cm]
        \draw[->] (0,0) -- (0,1.5);
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        \node at (0.3,0.16) {$\mathbb{R}^n$};
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    \draw \ringa;
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    \node at (-1,0.3) {$U_i$};
    \node at (+1,0.3) {$U_j$};
    \node at (-1.9,-2) {$V_i$};
    \node at (+1.9,-2) {$V_j$};
    \node at (+2.0,0.7) {$X$};

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    \path[->] (+0.35,0)  edge [bend angle=10,bend left]  node[label={[label distance=0.1cm]-30:$\varphi_j$}] {} (+1,-1.5);

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