![你好!你能帮我在乳胶中画出这个图表吗?](https://linux22.com/image/376821/%E4%BD%A0%E5%A5%BD%EF%BC%81%E4%BD%A0%E8%83%BD%E5%B8%AE%E6%88%91%E5%9C%A8%E4%B9%B3%E8%83%B6%E4%B8%AD%E7%94%BB%E5%87%BA%E8%BF%99%E4%B8%AA%E5%9B%BE%E8%A1%A8%E5%90%97%EF%BC%9F.png)
答案1
您可以使用tikz-cd
:
\documentclass{article}
\usepackage{tikz-cd}
\begin{document}
\[
\begin{tikzcd}
&
2 \arrow[dl,swap,"\beta"]
\\
1 \arrow[rr,shift left,"\lambda"]
\arrow[rr,shift right,swap,"\mu"]
&&
3 \arrow[ul,swap,"\alpha"]
\arrow[loop,out=30,in=330,looseness=10,"\gamma"]
\end{tikzcd}
\]
\end{document}
答案2
原来似乎是用xy-pic
。
\documentclass[border=5mm]{standalone}
\usepackage[all]{xy}
\begin{document}
\xymatrix@C=1in{
&
2
\ar @<-.5ex> [dl]_\beta
&
\\
1
\ar @<+.5ex> [rr]^\lambda
\ar @<-.5ex> [rr]_\mu
&&
3
\ar @<-.5ex> [lu]_\alpha
\ar @(ur,rd) []^\gamma
\\
}
\end{document}
尝试texdoc xypic
获取更多文档,或点击上面的链接。