
\subsection{\bf Formula for Stiffness Matrix Element---I}

\begin{slide}
\begin{itemize}

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\centerline{\psfig{figure=cps615.fig5.ps,clip=true,width=4.0in}}
Figure: FEM 5
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\item $S_ii = \displaystyle{\sum}_{\mbox{angles}\, \theta} \cot\, \theta$
where angles $\theta$ are opposite nodal point $i$ in a triangle with a
vertex at $i$.

\end{itemize}

\end{slide}

