You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
122 lines
2.7 KiB
122 lines
2.7 KiB
*> \brief \b SLCTSX
|
|
*
|
|
* =========== DOCUMENTATION ===========
|
|
*
|
|
* Online html documentation available at
|
|
* http://www.netlib.org/lapack/explore-html/
|
|
*
|
|
* Definition:
|
|
* ===========
|
|
*
|
|
* LOGICAL FUNCTION SLCTSX( AR, AI, BETA )
|
|
*
|
|
* .. Scalar Arguments ..
|
|
* REAL AI, AR, BETA
|
|
* ..
|
|
*
|
|
*
|
|
*> \par Purpose:
|
|
* =============
|
|
*>
|
|
*> \verbatim
|
|
*>
|
|
*> This function is used to determine what eigenvalues will be
|
|
*> selected. If this is part of the test driver SDRGSX, do not
|
|
*> change the code UNLESS you are testing input examples and not
|
|
*> using the built-in examples.
|
|
*> \endverbatim
|
|
*
|
|
* Arguments:
|
|
* ==========
|
|
*
|
|
*> \param[in] AR
|
|
*> \verbatim
|
|
*> AR is REAL
|
|
*> The numerator of the real part of a complex eigenvalue
|
|
*> (AR/BETA) + i*(AI/BETA).
|
|
*> \endverbatim
|
|
*>
|
|
*> \param[in] AI
|
|
*> \verbatim
|
|
*> AI is REAL
|
|
*> The numerator of the imaginary part of a complex eigenvalue
|
|
*> (AR/BETA) + i*(AI).
|
|
*> \endverbatim
|
|
*>
|
|
*> \param[in] BETA
|
|
*> \verbatim
|
|
*> BETA is REAL
|
|
*> The denominator part of a complex eigenvalue
|
|
*> (AR/BETA) + i*(AI/BETA).
|
|
*> \endverbatim
|
|
*
|
|
* Authors:
|
|
* ========
|
|
*
|
|
*> \author Univ. of Tennessee
|
|
*> \author Univ. of California Berkeley
|
|
*> \author Univ. of Colorado Denver
|
|
*> \author NAG Ltd.
|
|
*
|
|
*> \ingroup single_eig
|
|
*
|
|
* =====================================================================
|
|
LOGICAL FUNCTION SLCTSX( AR, AI, BETA )
|
|
*
|
|
* -- 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 ..
|
|
REAL AI, AR, BETA
|
|
* ..
|
|
*
|
|
* =====================================================================
|
|
*
|
|
* .. 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
|
|
SLCTSX = .FALSE.
|
|
ELSE
|
|
SLCTSX = .TRUE.
|
|
END IF
|
|
IF( I.EQ.MPLUSN ) THEN
|
|
FS = .FALSE.
|
|
I = 0
|
|
END IF
|
|
ELSE
|
|
I = I + 1
|
|
IF( I.LE.N ) THEN
|
|
SLCTSX = .TRUE.
|
|
ELSE
|
|
SLCTSX = .FALSE.
|
|
END IF
|
|
IF( I.EQ.MPLUSN ) THEN
|
|
FS = .TRUE.
|
|
I = 0
|
|
END IF
|
|
END IF
|
|
*
|
|
* IF( AR/BETA.GT.0.0 )THEN
|
|
* SLCTSX = .TRUE.
|
|
* ELSE
|
|
* SLCTSX = .FALSE.
|
|
* END IF
|
|
*
|
|
RETURN
|
|
*
|
|
* End of SLCTSX
|
|
*
|
|
END
|
|
|