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%%
%% Ein Beispiel der DANTE-Edition
%% Mathematiksatz mit LaTeX
%% 2. Auflage
%%
%% Beispiel 09-16-8 auf Seite 196.
%%
%% Copyright (C) 2012 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{352.81416pt}
\AtBeginDocument{\setlength\parindent{0pt}}
\setcounter{equation}{17}
\renewcommand\theequation{9.\arabic{equation}}
\StartShownPreambleCommands
\usepackage{amsmath,gauss}
\newcommand*\diff{\mathop{}\!\mathrm{d}}\setlength\arraycolsep{1.4pt}
\renewcommand\rowmultlabel[1]{\left|\,#1\right.} \def\xstrut{\rule{0pt}{5ex}}
\StopShownPreambleCommands
\begin{document}
\begin{equation} \renewcommand\arraystretch{1.8}
\begin{gmatrix}
\dfrac{1}{C}\int i\cdot\diff t+L\cdot\dfrac{\diff i}{\diff t}+R\cdot i\hfill &= & 0\\
\xstrut\dfrac{1}{C}\cdot i+L\cdot\dfrac{\diff ^2i}{\diff t^2}+
R\cdot\dfrac{\diff i}{\diff t}\hfill &= &0\\
\xstrut\dfrac{\diff ^2i}{\diff t^2}+\dfrac{R}{L}\cdot\dfrac{\diff i}{\diff t}+
\dfrac{1}{LC}\cdot i\hfill &= & 0\\
\xstrut\ddot{i}+\delta\dot{i}+\omega_0^2i\hfill & = &0
\rowops
\mult{0}{\mbox{Differentiation}} \mult{1}{:L\mbox{ und sortieren}}
\mult{2}{\dfrac{R}{L}=\delta;\ \dfrac{1}{LC}=\omega_0^2}
\end{gmatrix}
\end{equation}
\end{document}
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