TESTING/EIG/zslect.f(3)

NAME
TESTING/EIG/zslect.f

SYNOPSIS

  Functions/Subroutines
logical function zslect (z)
ZSLECT

Function/Subroutine Documentation

  logical function zslect (complex*16 z)

ZSLECT

Purpose:

     ZSLECT returns .TRUE. if the eigenvalue Z is to be selected,
     otherwise it returns .FALSE.
     It is used by ZCHK41 to test if ZGEES successfully sorts eigenvalues,
     and by ZCHK43 to test if ZGEESX successfully sorts eigenvalues.
     The common block /SSLCT/ controls how eigenvalues are selected.
     If SELOPT = 0, then ZSLECT return .TRUE. when real(Z) is less than
     zero, and .FALSE. otherwise.
     If SELOPT is at least 1, ZSLECT returns SELVAL(SELOPT) and adds 1
     to SELOPT, cycling back to 1 at SELMAX.

Parameters
    Z

              Z is COMPLEX*16
              The eigenvalue Z.

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 55 of file zslect.f.

Author

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