TESTING/EIG/sslect.f(3)    Library Functions Manual    TESTING/EIG/sslect.f(3)

NAME
       TESTING/EIG/sslect.f

SYNOPSIS
   Functions/Subroutines
       logical function sslect (zr, zi)
           SSLECT

Function/Subroutine Documentation
   logical function sslect (real zr, real zi)
       SSLECT

       Purpose:


            SSLECT returns .TRUE. if the eigenvalue ZR+sqrt(-1)*ZI is to be
            selected, and otherwise it returns .FALSE.
            It is used by SCHK41 to test if SGEES successfully sorts eigenvalues,
            and by SCHK43 to test if SGEESX successfully sorts eigenvalues.

            The common block /SSLCT/ controls how eigenvalues are selected.
            If SELOPT = 0, then SSLECT return .TRUE. when ZR is less than zero,
            and .FALSE. otherwise.
            If SELOPT is at least 1, SSLECT returns SELVAL(SELOPT) and adds 1
            to SELOPT, cycling back to 1 at SELMAX.

       Parameters
           ZR

                     ZR is REAL
                     The real part of a complex eigenvalue ZR + i*ZI.

           ZI

                     ZI is REAL
                     The imaginary part of a complex eigenvalue ZR + i*ZI.

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Definition at line 61 of file sslect.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

LAPACK                          Version 3.12.0         TESTING/EIG/sslect.f(3)