next up previous contents index
Next: LA_SPEVX / LA_HPEVX Up: Examples Previous: Example 2 (from Program   Contents   Index

Example 3 (from Program LA_HPEVD_EXAMPLE)

Matrix $A$ as in Example 2.

Array ${\bf AP}$ on entry:

\begin{displaymath}
\begin{array}{cc} {\bf AP} \\
\begin{array}{\vert ccccccc...
..., 0) &
(-5 , 2) &
(1 , 2) \\
\hline \end{array} \end{array}\end{displaymath}


\begin{displaymath}
\begin{array}{cc} {\bf AP\ continued} \\
\begin{array}{cccc...
..., 0) &
(-4 , 0) &
(-1 , 0) \\
\hline \end{array} \end{array}\end{displaymath}

The call:
CALL LA_HPEVD( A, W,
'L', Z, INFO )

Z and INFO on exit:


\begin{displaymath}
\begin{array}{c} {\bf Z} \\
\begin{array}{\vert ll} \hlin...
...-1},-4.23193 \times 10^{-1}) \\
\hline \end{array} \end{array}\end{displaymath}


\begin{displaymath}
\begin{array}{c} {\bf Z \ continued} \\
\begin{array}{ll}...
...-1},-4.67133 \times 10^{-1}) \\
\hline \end{array} \end{array}\end{displaymath}


\begin{displaymath}
\begin{array}{cc} {\bf Z \ continued} \\
\begin{array}{l\ve...
...y} \hspace{1.50 cm}
\begin{array}{c} {\bf INFO} = 0 \end{array}\end{displaymath}

The eigenvectors of $A$ are:

\begin{displaymath}
\left( \begin{array}{ll}
\;\;\; 3.98486 \times 10^{-1} & \;...
...\times 10^{-1} - 4.23193 \times 10^{-1}i
\end{array} \right.
\end{displaymath}


\begin{displaymath}
\left. \begin{array}{ll}
\;\;\; 7.03213 \times 10^{-1} & \;...
... \times 10^{-1} - 4.67133 \times 10^{-1}i
\end{array} \right.
\end{displaymath}


\begin{displaymath}
\left.
\begin{array}{ll}
\;\;\; 3.90130 \times 10^{-1} \\
...
... \times 10^{-1} - 2.80089 \times 10^{-1}i
\end{array} \right)
\end{displaymath}



Susan Blackford 2001-08-19