git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@15438 f3b2605a-c512-4ea7-a41b-209d697bcdaa

doc/src/Eqs/fix_controller1.tex

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+\documentclass[24pt]{article}
+
+\pagestyle{empty}
+\Huge
+
+\begin{document}
+
+\begin{eqnarray*}
+\frac{dc}{dt}  &=&Ê -\alpha (K_p e + K_i \int_0^t e \, dt + K_d \frac{de}{dt} ) \\
+\end{eqnarray*}
+
+\end{document}

doc/src/Eqs/fix_controller2.tex

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+\documentclass[24pt]{article}
+
+\pagestyle{empty}
+\Huge
+
+\begin{document}
+
+\begin{eqnarray*}
+c_n  &=&Ê c_{n-1} -\alpha (K_p \tau e_n + K_i \tau^2 \sum_{i=1}^n e_i + K_d (e_n - e_{n-1}) )
+\end{eqnarray*}
+
+\end{document}