slctes.f - Man Page

logical function slctes (zr, zi, d)
SLCTES

SLCTES

Purpose:

 SLCTES returns .TRUE. if the eigenvalue (ZR/D) + sqrt(-1)*(ZI/D)
 is to be selected (specifically, in this subroutine, if the real
 part of the eigenvalue is negative), and otherwise it returns
 .FALSE..

 It is used by the test routine SDRGES to test whether the driver
 routine SGGES successfully sorts eigenvalues.

Parameters

ZR

          ZR is REAL
          The numerator of the real part of a complex eigenvalue
          (ZR/D) + i*(ZI/D).

ZI

          ZI is REAL
          The numerator of the imaginary part of a complex eigenvalue
          (ZR/D) + i*(ZI).

D

          D is REAL
          The denominator part of a complex eigenvalue
          (ZR/D) + i*(ZI/D).

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 67 of file slctes.f.