为了扩展 Percusse 的评论,你可以从以下代码开始:
\documentclass{article}
\usepackage{amsmath,tikz-cd}
\begin{document}
\begin{equation*}
\begin{tikzcd}[column sep=2cm]
A\arrow[r,"\text{inclusion}"] \arrow[rd, swap,"\varphi"] & F(A) \arrow[d,"\Phi"] \\
& M
\end{tikzcd}
\end{equation*}
\end{document}
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