zgetrs - solve a system of linear equations A * X = B, A**T * X = B, or A**H * X = B with a general N-by-N matrix A using the LU factoriza- tion computed by ZGETRF
SUBROUTINE ZGETRS(TRANSA, N, NRHS, A, LDA, IPIVOT, B, LDB, INFO) CHARACTER*1 TRANSA DOUBLE COMPLEX A(LDA,*), B(LDB,*) INTEGER N, NRHS, LDA, LDB, INFO INTEGER IPIVOT(*) SUBROUTINE ZGETRS_64(TRANSA, N, NRHS, A, LDA, IPIVOT, B, LDB, INFO) CHARACTER*1 TRANSA DOUBLE COMPLEX A(LDA,*), B(LDB,*) INTEGER*8 N, NRHS, LDA, LDB, INFO INTEGER*8 IPIVOT(*) F95 INTERFACE SUBROUTINE GETRS(TRANSA, N, NRHS, A, LDA, IPIVOT, B, LDB, INFO) CHARACTER(LEN=1) :: TRANSA COMPLEX(8), DIMENSION(:,:) :: A, B INTEGER :: N, NRHS, LDA, LDB, INFO INTEGER, DIMENSION(:) :: IPIVOT SUBROUTINE GETRS_64(TRANSA, N, NRHS, A, LDA, IPIVOT, B, LDB, INFO) CHARACTER(LEN=1) :: TRANSA COMPLEX(8), DIMENSION(:,:) :: A, B INTEGER(8) :: N, NRHS, LDA, LDB, INFO INTEGER(8), DIMENSION(:) :: IPIVOT C INTERFACE #include <sunperf.h> void zgetrs(char transa, int n, int nrhs, doublecomplex *a, int lda, int *ipivot, doublecomplex *b, int ldb, int *info); void zgetrs_64(char transa, long n, long nrhs, doublecomplex *a, long lda, long *ipivot, doublecomplex *b, long ldb, long *info);
Oracle Solaris Studio Performance Library zgetrs(3P) NAME zgetrs - solve a system of linear equations A * X = B, A**T * X = B, or A**H * X = B with a general N-by-N matrix A using the LU factoriza- tion computed by ZGETRF SYNOPSIS SUBROUTINE ZGETRS(TRANSA, N, NRHS, A, LDA, IPIVOT, B, LDB, INFO) CHARACTER*1 TRANSA DOUBLE COMPLEX A(LDA,*), B(LDB,*) INTEGER N, NRHS, LDA, LDB, INFO INTEGER IPIVOT(*) SUBROUTINE ZGETRS_64(TRANSA, N, NRHS, A, LDA, IPIVOT, B, LDB, INFO) CHARACTER*1 TRANSA DOUBLE COMPLEX A(LDA,*), B(LDB,*) INTEGER*8 N, NRHS, LDA, LDB, INFO INTEGER*8 IPIVOT(*) F95 INTERFACE SUBROUTINE GETRS(TRANSA, N, NRHS, A, LDA, IPIVOT, B, LDB, INFO) CHARACTER(LEN=1) :: TRANSA COMPLEX(8), DIMENSION(:,:) :: A, B INTEGER :: N, NRHS, LDA, LDB, INFO INTEGER, DIMENSION(:) :: IPIVOT SUBROUTINE GETRS_64(TRANSA, N, NRHS, A, LDA, IPIVOT, B, LDB, INFO) CHARACTER(LEN=1) :: TRANSA COMPLEX(8), DIMENSION(:,:) :: A, B INTEGER(8) :: N, NRHS, LDA, LDB, INFO INTEGER(8), DIMENSION(:) :: IPIVOT C INTERFACE #include <sunperf.h> void zgetrs(char transa, int n, int nrhs, doublecomplex *a, int lda, int *ipivot, doublecomplex *b, int ldb, int *info); void zgetrs_64(char transa, long n, long nrhs, doublecomplex *a, long lda, long *ipivot, doublecomplex *b, long ldb, long *info); PURPOSE zgetrs solves a system of linear equations A * X = B, A**T * X = B, or A**H * X = B with a general N-by-N matrix A using the LU factorization computed by ZGETRF. ARGUMENTS TRANSA (input) Specifies the form of the system of equations: = 'N': A * X = B (No transpose) = 'T': A**T * X = B (Transpose) = 'C': A**H * X = B (Conjugate transpose) N (input) The order of the matrix A. N >= 0. NRHS (input) The number of right hand sides, i.e., the number of columns of the matrix B. NRHS >= 0. A (input) The factors L and U from the factorization A = P*L*U as com- puted by ZGETRF. LDA (input) The leading dimension of the array A. LDA >= max(1,N). IPIVOT (input) The pivot indices from ZGETRF; for 1<=i<=N, row i of the matrix was interchanged with row IPIVOT(i). B (input/output) On entry, the right hand side matrix B. On exit, the solu- tion matrix X. LDB (input) The leading dimension of the array B. LDB >= max(1,N). INFO (output) = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value 7 Nov 2015 zgetrs(3P)