%% The LaTeX Companion, 2ed (second printing August 2004)

%%
%% The LaTeX Companion, 2ed (second printing August 2004)
%%
%% Example 8-3-8 on page 489.
%%
%% Copyright (C) 2004 Frank Mittelbach, Michel Goossens,
%% Johannes Braams, David Carlisle, and Chris Rowley
%%
%% 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{159.0pt}

\StartShownPreambleCommands

\StopShownPreambleCommands
\begin{document}
\[\begin{array}{ccc}
S^{\mathcal{W}_\Lambda}\otimes T &
\stackrel{j}{\longrightarrow} &
T \\
\Big\downarrow & &
\Big\downarrow\vcenter{%
\rlap{$\scriptstyle{\mathrm{End}}\,P$}} \\
(S\otimes T)/I & = &
(Z\otimes T)/J
\end{array}\]
\end{document}