答案1
您的问题有点像“帮我做”的问题……
作为起点,如果您喜欢使用tikz
包进行绘图,可以提供以下(伪)代码:
\documentclass[tikz, border=1ex]{standalone}
\begin{document}
\begin{tikzpicture}
\draw[draw=green, very thick, rounded corners, fill=gray]
(<coordinate 1>) -- (<coordinate 2>) -- %and so on
(<coordinate k>) node[above=3mm] {$\Omega$} -- %and so on
(<coordinate n) -- cycle;
\draw[draw=red, very thick, rounded corners, fill=white]
(<coordinate 1>) -- (<coordinate 2>) -- %and so on
(<coordinate j>) node[above=3mm] {$\Gamma_u$} -- %and so on
(<coordinate n) -- cycle;
\end{tikzpicture}
\end{document}
坐标的选择由你决定。你还可以选择将节点与 $\Gamma_m$ 关联到哪一个。