
\subsection{\bf Bilinear Form of Integral}
\subsection{\bf with Triangular Elements}

\begin{slide}

\begin{itemize}
\item Now consider a triangulation of $\Omega$ (Figure~FEM~4)

\vspace{5pt}
\begin{center}
\centerline{\psfig{figure=cps615.fig4.ps,clip=true,width=3.75in}}
Figure: FEM 4
\end{center}
\vspace{5pt}

\item We can write
\[
F = \frac{1}{4} \underline{\varphi}^T {\twelvebxti S}
\underline{\varphi}
\]
where $\underline{\varphi}$ is the vector of vertex values of $\varphi$
and {\twentybxti S} is called a stiffness matrix
\end{itemize}
\end{slide}

