%% 
%%  Der Mathematiksatz mit LaTeX, 1. Auflage 2009
%% 
%%  Example 8-1-11 on page 162.
%% 
%%  Copyright (C) 2009 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.
%% 

\documentclass[]{ttctminimal}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{355.65944pt}
\usepackage[utf8]{inputenc}
\AtBeginDocument{\setlength\parindent{0pt}}
\StartShownPreambleCommands

\StopShownPreambleCommands
\begin{document}
Voreinstellung: \verb+\the\nulldelimiterspace+: \the\nulldelimiterspace
$$ X \left( x=x \right. X $$
Geändert: \nulldelimiterspace=10\nulldelimiterspace
\verb+\the\nulldelimiterspace+: \the\nulldelimiterspace
$$ X \left( x=x \right. X $$
\end{document}