%% 
%%  Example 03-02-5 
%%  Copyright (C) 2016 Herbert Voss
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{screxa}
\pagestyle{empty}
\setlength\textwidth{158.31393pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\def\dA{\mathaccent"7015\relax}
%StopShownPreambleCommands
\begin{document}
\Large
$a|b \quad a\mathbin| b$
\end{document}
