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Example (from Program LA_SYEVX_EXAMPLE)

The results below are computed with $\epsilon = 1.19209 \times 10^{-7}$.
Matrix $A$ is the same as in Example 1 for LA_SYEV.

The call:
CALL LA_SYEVX( A, W, VL
=-7.0_wp, VU=7.0_wp, M=M, ABSTOL=1.0E-4_wp )7.1

${\bf W}$ and M on exit:

\begin{displaymath}
\begin{array}{cc} {\bf W} \\
\begin{array}{\vert r\vert} ...
...ray}{c} \\ \begin{array}{c} {\bf M} = 3 \end{array} \end{array}\end{displaymath}

There are three eigenvalues of matrix $A$ in the interval $[-7, 7]$:

\begin{displaymath}
\left( \begin{array}{r}
-6.2497292 \\ 1.1852608 \\ 5.0013161
\end{array} \right).
\end{displaymath}



Susan Blackford 2001-08-19