我有兴趣通过 tikz 绘制这个图形：
我自己通过 Inkscape 制作了这个图形。
通过 tikz 制作这个图形的最佳策略是什么？
答：对我们来说，最好的方法似乎是从头开始。
但是，有一种方法可以解决此问题，我可以从 Inkscape 输出 LaTex 文件，但这会给出一组可怕的代码：
（最小模板对于我来说太复杂了……）
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答案1
我不知道如何解释这个问题。用 Ti 画这个图显然不太难钾Z. 最好的策略是什么？也许从例子中学习是最快的方法。
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node[pos=0.3,below]{$\mathbbm{T}^2$} ([yshift=-0.1cm]-100:0.2);
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\node[anchor=south] at (0,0.2) {2};
\node[anchor=north] at (0,-0.2) {3};
\node at (2,2) {$\mathbbm{S}^4$};
\draw[double=gray,double distance=2pt,very thin,opacity=0.3] (0,2) to[out=135,in=-135,looseness=1.5]
node[midway,left,opacity=1]{1} node[pos=0.9,below,opacity=1]{$\mathbbm{T}^2$} (0,-2);
\end{tikzpicture}
\end{document}
