%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 7-4-11 on page 485.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{207.83385pt}
\StartShownPreambleCommands
\usepackage{diagxy,amsmath}
\StopShownPreambleCommands
\begin{document}
\[\bfig
 \iiixii|aaaalmr|<1000,800>
        [X`Y`Z`X\oplus X_0`Y\oplus X_0\oplus Z_0`Z\oplus Z_0;
         f_1`f_2`\begin{pmatrix}f_1&0\\0&1\\0&0\end{pmatrix}`
                 \begin{pmatrix}f_2&0&0\\0&0&1\end{pmatrix}`
                 \begin{pmatrix}1\\0\end{pmatrix}`
                 \begin{pmatrix}1\\0\\0\end{pmatrix}`
                 \begin{pmatrix}1\\0\end{pmatrix}]
\efig\]
\end{document}