我写了下面的代码
\documentclass[12pt,a4paper]{report}
\usepackage{amsmath,amsfonts,amssymb}
\usepackage{tikz}
\usetikzlibrary{matrix}
\begin{document}
\[
\begin{tikzpicture}
\matrix (m) [matrix of math nodes,row sep=3em,column sep=4em,minimum width=2em]
{
e\subset\Gamma & f(e)\subset \Gamma' \\
\mathbb{R}\supset [0,l_{\Gamma}(e)] & [0,S_{f,e}l_{\Gamma}(e)] \subset\mathbb{R} \\};
\path[-stealth]
(m-1-1) edge node [left] {} (m-2-1)
edge node [above] {$f|_e$} (m-1-2)
(m-2-1.east|-m-2-2) edge node [below] {$t\mapsto S_{f,e}t$}
(m-2-2)
(m-2-2) edge node [right] {} (m-1-2)
;
\end{tikzpicture}
\]
\end{document}
我得到的是
在右上角为什么没有,[0,S_{f,e}l_{\Gamma}(e)] \subset\mathbb{R}
而我只得到了\subset\mathbb{R}
?
提前致谢!