% Fichier ex4.8.4-10.tex - Ch. Rolland/O Reilly France
\documentclass{article}
\usepackage[latin1]{inputenc}
\usepackage{amsmath}
\usepackage{amscd}
\begin{document}
\begin{equation*}
\begin{CD}
S^{{\mathcal{W}}_\Lambda}\otimes 
                T @>j>> T \\
@VVV                  @VV{End\ P}V\\
(S\otimes T)/I  @=    (Z\otimes T)/J
\end{CD}
\end{equation*}
\end{document}
