%% %% An UIT Edition example %% %% Example 09-16-8 on page 185. %% %% 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}{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.} \newcommand*\xstrut{\rule{0pt}{5ex}} \StopShownPreambleCommands \begin{document} $$\renewcommand\arraystretch{1.8} \begin{gmatrix} \dfrac{1}{C}\int i\times\diff t+L\times\dfrac{\diff i}{\diff t} +R\times i\hfill &= & 0\\ \xstrut\dfrac{1}{C}\times i+L\times\dfrac{\diff ^2i}{\diff t^2}+ R\times\dfrac{\diff i}{\diff t}\hfill &= &0\\ \xstrut\dfrac{\diff ^2i}{\diff t^2}+\dfrac{R}{L}\times\dfrac{\diff i}{\diff t}+ \dfrac{1}{LC}\times i\hfill &= & 0\\ \xstrut\ddot{i}+\delta\dot{i}+\omega_0^2i\hfill & = &0 \rowops \mult{0}{\mbox{differentiation}} \mult{1}{:L\mbox{ and sorting}} \mult{2}{\dfrac{R}{L}=\delta;\ \dfrac{1}{LC}=\omega_0^2} \end{gmatrix}$$ \end{document}