答案 0 :(得分:3)
只是为了好玩tikz-cd
中的一个版本:
\documentclass{article}
\usepackage{tikz-cd}
\usepackage{mathtools}
\begin{document}
\begin{tikzcd}[
arrow style=tikz,
>={latex}
]
\arrow[rd,shift left] \arrow[rd,<-,shift right,-] & & & & & & \\
& \text{\textbullet} \arrow[rrd,shift left]\arrow[rrd,shift right,<-] \arrow[dd,shift left,"prev(e)",teal] \arrow[dd,shift right,<-] & & & & & \arrow[ld,shift left] \arrow[ld,shift right,-] \\
& & & \text{\textbullet} \arrow[rr,shift left] \arrow[rr,shift right,<-]& & \text{\textbullet} \arrow[ld,shift left]\arrow[ld,shift right,<-,"next(e)",swap,green,near end] & \\
& \text{\textbullet} \arrow[rrr,shift left,"e",blue]\arrow[rrr,shift right,<-,"twin(e)",swap,orange] & & & \text{\textbullet} \arrow[rd,shift left,-]\arrow[rd,shift right,<-] & & \\
& & & & & ~ &
\end{tikzcd}
\end{document}