%% 
%%  An UIT Edition example
%% 
%%  Example 04-02-1 on page 35.
%% 
%%  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{177.70511pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\StartShownPreambleCommands

\StopShownPreambleCommands
\begin{document}
$\matrix{ A & B & C \cr  d & e & f \cr
 1 & 2 & 3 }$ \qquad
$\pmatrix{ A & B & C \cr  d & e & f \cr
  1 & 2 & 3 }$ \\[5pt]
$\bordermatrix{
   & 0 & 1 & 2 \cr
 0 & A & B & C \cr
 1 & d & e & f \cr
 2 & 1 & 2 & 3 }$
\end{document}