zhseqr example program

This example computes all the eigenvalues and the Schur factorization of the upper Hessenberg matrix

H

, where

H = (\begin{array}{r} - 3.9700 - 5.0400 i & - 1.1318 - 2.5693 i & - 4.6027 - 0.1426 i & - 1.4249 + 1.7330 i \\ - 5.4797 + 0.0000 i & 1.8585 - 1.5502 i & 4.4145 - 0.7638 i & - 0.4805 - 1.1976 i \\ 0.0000 + 0.0000 i & 6.2673 + 0.0000 i & - 0.4504 - 0.0290 i & - 1.3467 + 1.6579 i \\ 0.0000 + 0.0000 i & 0.0000 + 0.0000 i & - 3.5000 + 0.0000 i & 2.5619 - 3.3708 i \end{array}) .

See also zunghr, which illustrates the use of this routine to compute the Schur factorization of a general matrix.

Example program for zhseqr