
\subsection{\bf Structure of Stiffness Matrix}
\subsection{\bf and Its Assembly}

\begin{slide}

\begin{itemize}
\item $N$ has contributions from five triangles in picture (Figure~FEM~7)
\item This is called ``assembly of the stiffness matrix $S$''
\item Note by using variational formalism, we have avoided need for
regular grid
\end{itemize}

\vspace{5pt}
\begin{center}
\centerline{\psfig{figure=cps615.fig7.ps,clip=true,width=4.0in}}
Figure: FEM 7
\end{center}
\vspace{5pt}

\end{slide}

