LaTeX-examples/documents/GeoTopo/figures/topology-sphere-with-hole.tex

\begin{tikzpicture}[tqft/flow=east]
    \draw (0,0) circle (2cm);
    \draw (0,0) ellipse (2cm and 0.35cm);
    \draw[white,fill=white] (0,0.1) ellipse (1.95cm and 0.35cm);
    \draw[dashed] (0,0) ellipse (2cm and 0.35cm);

    \begin{scope}[rotate=45]
        \draw (0.5,1.2) ellipse (0.5cm and 0.4cm);
    \end{scope}

    \node at (2.38,0) {$\stackrel{\sim}{=}$};

    \draw (3.8,0) circle (1cm);
\end{tikzpicture}