zlctsx()

logical function zlctsx	(	complex*16	alpha,
		complex*16	beta )

ZLCTSX

Purpose:

!>
!> This function is used to determine what eigenvalues will be
!> selected.  If this is part of the test driver ZDRGSX, do not
!> change the code UNLESS you are testing input examples and not
!> using the built-in examples.
!> 

Parameters

[in]	ALPHA	!> ALPHA is COMPLEX*16 !>
[in]	BETA	!> BETA is COMPLEX*16 !> !> parameters to decide whether the pair (ALPHA, BETA) is !> selected. !>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 56 of file zlctsx.f.

*
*  -- LAPACK test routine --
*  -- LAPACK is a software package provided by Univ. of Tennessee,    --
*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
*
*     .. Scalar Arguments ..
      COMPLEX*16         ALPHA, BETA
*     ..
*
*  =====================================================================
*
*     .. Parameters ..
*     DOUBLE PRECISION               ZERO
*     PARAMETER          ( ZERO = 0.0E+0 )
*     COMPLEX*16            CZERO
*     PARAMETER          ( CZERO = ( 0.0E+0, 0.0E+0 ) )
*     ..
*     .. Scalars in Common ..
      LOGICAL            FS
      INTEGER            I, M, MPLUSN, N
*     ..
*     .. Common blocks ..
      COMMON             / mn / m, n, mplusn, i, fs
*     ..
*     .. Save statement ..
      SAVE
*     ..
*     .. Executable Statements ..
*
      IF( fs ) THEN
         i = i + 1
         IF( i.LE.m ) THEN
            zlctsx = .false.
         ELSE
            zlctsx = .true.
         END IF
         IF( i.EQ.mplusn ) THEN
            fs = .false.
            i = 0
         END IF
      ELSE
         i = i + 1
         IF( i.LE.n ) THEN
            zlctsx = .true.
         ELSE
            zlctsx = .false.
         END IF
         IF( i.EQ.mplusn ) THEN
            fs = .true.
            i = 0
         END IF
      END IF
*
*      IF( BETA.EQ.CZERO ) THEN
*         ZLCTSX = ( DBLE( ALPHA ).GT.ZERO )
*      ELSE
*         ZLCTSX = ( DBLE( ALPHA/BETA ).GT.ZERO )
*      END IF
*
      RETURN
*
*     End of ZLCTSX
*

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