1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
\documentclass{ppex}
\nonstopmode
\usepackage [all,2cell]{xy}
\pagestyle{empty}
\setlength\textwidth{183.0pt}
\begin{document}
\ResetPreambleCommands
\ReadyForTheFray
\usepackage [all,2cell]{xy}
\UseAllTwocells
\[
\renewcommand{\objectstyle}{\scriptstyle}
\renewcommand{\labelstyle}{\scriptstyle}
\xymatrix @=1pc {
&& \bullet \ar[2,2]
\\ \\
\bullet \ar[-2,2]
\rrtwocell {=}
\xtwocell[0,4]{}\omit{^<-4>a}
&& x_b \ar[rr] \ar[dr]_{\mathrm{id}_x}
\rrtwocell\omit{<1.5>}
&& \bullet
\\ &&& x_e \ar[ur]
}\]
\end{document}
|
