%% 
%%  Der Mathematiksatz mit LaTeX, 1. Auflage 2009
%% 
%%  Example 3-3-4 on page 24.
%% 
%%  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[]{ttctexareport}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{355.65944pt}
\setlength\parindent{0pt}
\usepackage[lucidasmallscale]{lucidabr}
\setlength\textwidth{160pt}
\setlength\textheight{200pt}
\usepackage[utf8]{inputenc}
\AtBeginDocument{\sloppy}
\StartShownPreambleCommands
\usepackage{chngcntr}
\counterwithout{equation}{chapter}
\newcommand*\diff{\mathop{}\!\mathrm{d}}
\StopShownPreambleCommands
\begin{document}
\chapter{foo}
\begin{equation} f(x)= \int\frac{\sin x}{x}\diff x \end{equation}
\begin{equation} f(x)= \int\frac{1}{x^2}\diff x \end{equation}
\chapter{bar}
Die \texttt{equation}-Zählung wird jetzt durch das neue Kapitel nicht zurückgesetzt.
\begin{equation} f(x)= \int\frac{\sin x}{x}\diff x \end{equation}
\begin{equation} f(x)= \int\frac{1}{x^2}\diff x \end{equation}
\end{document}