zgebak
zgebak - form the right or left eigenvectors of a complex general matrix by backward transformation on the computed eigenvectors of the balanced matrix output by CGEBAL
SUBROUTINE ZGEBAK( JOB, SIDE, N, ILO, IHI, SCALE, M, V, LDV, INFO)
CHARACTER * 1 JOB, SIDE
DOUBLE COMPLEX V(LDV,*)
INTEGER N, ILO, IHI, M, LDV, INFO
DOUBLE PRECISION SCALE(*)
SUBROUTINE ZGEBAK_64( JOB, SIDE, N, ILO, IHI, SCALE, M, V, LDV,
* INFO)
CHARACTER * 1 JOB, SIDE
DOUBLE COMPLEX V(LDV,*)
INTEGER*8 N, ILO, IHI, M, LDV, INFO
DOUBLE PRECISION SCALE(*)
SUBROUTINE GEBAK( JOB, SIDE, [N], ILO, IHI, SCALE, [M], V, [LDV],
* [INFO])
CHARACTER(LEN=1) :: JOB, SIDE
COMPLEX(8), DIMENSION(:,:) :: V
INTEGER :: N, ILO, IHI, M, LDV, INFO
REAL(8), DIMENSION(:) :: SCALE
SUBROUTINE GEBAK_64( JOB, SIDE, [N], ILO, IHI, SCALE, [M], V, [LDV],
* [INFO])
CHARACTER(LEN=1) :: JOB, SIDE
COMPLEX(8), DIMENSION(:,:) :: V
INTEGER(8) :: N, ILO, IHI, M, LDV, INFO
REAL(8), DIMENSION(:) :: SCALE
#include <sunperf.h>
void zgebak(char job, char side, int n, int ilo, int ihi, double *scale, int m, doublecomplex *v, int ldv, int *info);
void zgebak_64(char job, char side, long n, long ilo, long ihi, double *scale, long m, doublecomplex *v, long ldv, long *info);
zgebak forms the right or left eigenvectors of a complex general
matrix by backward transformation on the computed eigenvectors of the
balanced matrix output by CGEBAL.
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* JOB (input)
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Specifies the type of backward transformation required:
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* SIDE (input)
-
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* N (input)
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The number of rows of the matrix V. N >= 0.
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* ILO (input)
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The integer ILO determined by CGEBAL.
1 <= ILO <= IHI <= N, if N > 0; ILO=1 and IHI=0, if N=0.
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* IHI (input)
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The integer IHI determined by CGEBAL.
1 <= ILO <= IHI <= N, if N > 0; ILO=1 and IHI=0, if N=0.
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* SCALE (input)
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Details of the permutation and scaling factors, as returned
by CGEBAL.
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* M (input)
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The number of columns of the matrix V. M >= 0.
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* V (input/output)
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On entry, the matrix of right or left eigenvectors to be
transformed, as returned by CHSEIN or CTREVC.
On exit, V is overwritten by the transformed eigenvectors.
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* LDV (input)
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The leading dimension of the array V. LDV >= max(1,N).
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* INFO (output)
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