答案1
只是为了好玩,与tikz-cd
。
\documentclass{article}
\usepackage{tikz-cd}
\begin{document}
\begin{tikzcd}[every arrow/.append style={-stealth}]
& \mathbf{1} \arrow[dash,dash pattern=on 1em off 1ex,-,r] & \mathbf{1} & \\
P^{1,n} \arrow[ur,start anchor=east] \arrow[r,start anchor=east] \arrow[dr,start anchor=east]
& \mathbf{1} \arrow[dash,dash pattern=on 1em off 1ex,-,r] & \mathbf{2} &
P^{n+1}\arrow[ul,start anchor=west] \arrow[l,start anchor=west] \arrow[dl,start
anchor=west]\\
& \mathbf{2} \arrow[dash,dash pattern=on 1em off 1ex,-,r] & \mathbf{2} & \\
\end{tikzcd}
\end{document}
答案2
以下内容可能对您有帮助,但我相信一些专家会给出更好的建议:
\documentclass{book}
\usepackage{array,multirow,rotating}
\begin{document}
\begin{tabular}{c c c}
1 &{-}{-} &1\\
\multirow{3}{*}{%
\rlap{\begin{picture}(0,0)(0,0)
\put(-30,12){\hbox to 2pc{\rightarrowfill}}
\put(-30,12){\rotatebox{25}{\hbox to 2pc{\rightarrowfill}}}
\put(-30,12){\rotatebox{-25}{\hbox to 2pc{\rightarrowfill}}}
\end{picture}
\smash{\rotatebox{180}{\begin{picture}(0,0)(65,17)
\put(0,0){\hbox to 2pc{\rightarrowfill}}
\put(0,0){\rotatebox{25}{\hbox to 2pc{\rightarrowfill}}}
\put(0,0){\rotatebox{-25}{\hbox to 2pc{\rightarrowfill}}}
\end{picture}}}
}}1 &{-}{-} &2\\
2 &{-}{-} &2
\end{tabular}
\end{document}