LAPACK  3.5.0
LAPACK: Linear Algebra PACKage
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dlctes.f File Reference

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Functions/Subroutines

logical function dlctes (ZR, ZI, D)
 DLCTES More...
 

Function/Subroutine Documentation

logical function dlctes ( double precision  ZR,
double precision  ZI,
double precision  D 
)

DLCTES

Purpose:
 DLCTES 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 DDRGES to test whether the driver
 routine DGGES succesfully sorts eigenvalues.
Parameters
[in]ZR
          ZR is DOUBLE PRECISION
          The numerator of the real part of a complex eigenvalue
          (ZR/D) + i*(ZI/D).
[in]ZI
          ZI is DOUBLE PRECISION
          The numerator of the imaginary part of a complex eigenvalue
          (ZR/D) + i*(ZI).
[in]D
          D is DOUBLE PRECISION
          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.
Date
November 2011

Definition at line 69 of file dlctes.f.