%%
%% An UIT Edition example
%%
%% Example 09-10-1 on page 175.
%%
%% Copyright (C) 2010 Herbert Voss
%%
%% 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.
%%
%%
%% ====
% Show page(s) 1
%%
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\StartShownPreambleCommands
\usepackage{delarray}
\StopShownPreambleCommands
\begin{document}
\[ A=\begin{array}\|{cc}\|
a & b\\
c & d
\end{array} \]
\[ B=\begin{array}\lbrack{cc}\rbrack
a & b\\
c & d
\end{array} \]
\end{document}
