%%
%% An UIT Edition example
%%
%% Example 04-01-5 on page 34.
%%
%% 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{375.57637pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\setcounter{equation}{3}
\renewcommand\theequation{4.\arabic{equation}}
\StartShownPreambleCommands
\StopShownPreambleCommands
\begin{document}
\begin{equation}
x=\left\{ \begin{array}{cl}
0 & \textrm{if A=\ldots}\\
1 & \textrm{if B=\ldots}\\
x & \textrm{This text can be as long as you want it to be,
but it will not be wrapped\ldots}
\end{array}\right.
\end{equation}
\end{document}
