ZHEEVX Example

To find the eigenvalues in the half-open interval $\left(\vphantom{-2, 2}\right.$ -2, 2$\left.\vphantom{-2, 2}\right]$, and the corresponding eigenvectors, of the Hermitian matrix

A = $$\left(\vphantom{ \begin{array}{cccc} 1 & 2 - i & 3 - i & 4 - i ... ...i & 3 + 2i & 3 & 4 - 3i \\ 4 + i & 4 + 2i & 4 + 3i & 4 \end{array} }\right.$$$$\begin{array}{cccc} 1 & 2 - i & 3 - i & 4 - i \\ 2 + i & 2 & ... ...\ 3 + i & 3 + 2i & 3 & 4 - 3i \\ 4 + i & 4 + 2i & 4 + 3i & 4 \end{array}$$$$\left.\vphantom{ \begin{array}{cccc} 1 & 2 - i & 3 - i & 4 - i ... ...i & 3 + 2i & 3 & 4 - 3i \\ 4 + i & 4 + 2i & 4 + 3i & 4 \end{array} }\right)$$.

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