Tikzcd 基本示例

Question

我有这个代码：

 \begin{center}
 \begin{tikzcd}
    L   
    \ar[d, dash, dashed]  
    \ar[d, dash, dashed] 
    \\
    E
    \ar[d,dash,"<\infty \ \  \emph{separable}"] 
    \\
    F
\end{tikzcd}
\end{center}

输出：

我怎样才能完成代码才能实现这个？

Answer 1

to path您可以按照手册中的说明使用自定义的箭头。

\documentclass[border=5mm,tikz]{standalone}
\usepackage{tikz-cd}
\usepackage{amsmath}
\begin{document}


\begin{tikzcd}
 \ar[dd, dash,dashed,
     "\text{something}" swap,
     to path={
           -- ([xshift=-1.5cm]\tikztostart.east)
           |- (\tikztotarget) [pos=0.25] \tikztonodes
     }]
    L   
    \ar[d, dash, dashed]  
    \ar[d, dash, dashed] 
    \\
    E
    \ar[d,dash,"<\infty \ \  \emph{separable}"] 
    \\
    F
\end{tikzcd}
\end{document}