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:

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

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

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