zsytrs2 - solve a system of linear equations A*X = B with a complex symmetric matrix A using the factorization computed by ZSYTRF and con- verted by ZSYCONV
SUBROUTINE ZSYTRS2(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO) CHARACTER*1 UPLO INTEGER INFO, LDA, LDB, N, NRHS INTEGER IPIV(*) DOUBLE COMPLEX A(LDA,*), B(LDB,*), WORK(*) SUBROUTINE ZSYTRS2_64(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO) CHARACTER*1 UPLO INTEGER*8 INFO, LDA, LDB, N, NRHS INTEGER*8 IPIV(*) DOUBLE COMPLEX A(LDA,*), B(LDB,*), WORK(*) F95 INTERFACE SUBROUTINE SYTRS2(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO) INTEGER :: N, NRHS, LDA, LDB, INFO CHARACTER(LEN=1) :: UPLO INTEGER, DIMENSION(:) :: IPIV COMPLEX(8), DIMENSION(:,:) :: A, B COMPLEX(8), DIMENSION(:) :: WORK SUBROUTINE SYTRS2_64(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO) INTEGER(8) :: N, NRHS, LDA, LDB, INFO CHARACTER(LEN=1) :: UPLO INTEGER(8), DIMENSION(:) :: IPIV COMPLEX(8), DIMENSION(:,:) :: A, B COMPLEX(8), DIMENSION(:) :: WORK C INTERFACE #include <sunperf.h> void zsytrs2 (char uplo, int n, int nrhs, doublecomplex *a, int lda, int *ipiv, doublecomplex *b, int ldb, int *info); void zsytrs2_64 (char uplo, long n, long nrhs, doublecomplex *a, long lda, long *ipiv, doublecomplex *b, long ldb, long *info);
Oracle Solaris Studio Performance Library zsytrs2(3P) NAME zsytrs2 - solve a system of linear equations A*X = B with a complex symmetric matrix A using the factorization computed by ZSYTRF and con- verted by ZSYCONV SYNOPSIS SUBROUTINE ZSYTRS2(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO) CHARACTER*1 UPLO INTEGER INFO, LDA, LDB, N, NRHS INTEGER IPIV(*) DOUBLE COMPLEX A(LDA,*), B(LDB,*), WORK(*) SUBROUTINE ZSYTRS2_64(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO) CHARACTER*1 UPLO INTEGER*8 INFO, LDA, LDB, N, NRHS INTEGER*8 IPIV(*) DOUBLE COMPLEX A(LDA,*), B(LDB,*), WORK(*) F95 INTERFACE SUBROUTINE SYTRS2(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO) INTEGER :: N, NRHS, LDA, LDB, INFO CHARACTER(LEN=1) :: UPLO INTEGER, DIMENSION(:) :: IPIV COMPLEX(8), DIMENSION(:,:) :: A, B COMPLEX(8), DIMENSION(:) :: WORK SUBROUTINE SYTRS2_64(UPLO, N, NRHS, A, LDA, IPIV, B, LDB, WORK, INFO) INTEGER(8) :: N, NRHS, LDA, LDB, INFO CHARACTER(LEN=1) :: UPLO INTEGER(8), DIMENSION(:) :: IPIV COMPLEX(8), DIMENSION(:,:) :: A, B COMPLEX(8), DIMENSION(:) :: WORK C INTERFACE #include <sunperf.h> void zsytrs2 (char uplo, int n, int nrhs, doublecomplex *a, int lda, int *ipiv, doublecomplex *b, int ldb, int *info); void zsytrs2_64 (char uplo, long n, long nrhs, doublecomplex *a, long lda, long *ipiv, doublecomplex *b, long ldb, long *info); PURPOSE zsytrs2 solves a system of linear equations A*X = B with a complex sym- metric matrix A using the factorization A = U*D*U**T or A = L*D*L**T computed by ZSYTRF and converted by ZSYCONV. ARGUMENTS UPLO (input) UPLO is CHARACTER*1 Specifies whether the details of the factorization are stored as an upper or lower triangular matrix. = 'U': Upper triangular, form is A = U*D*U**T; = 'L': Lower triangular, form is A = L*D*L**T. N (input) N is INTEGER The order of the matrix A. N >= 0. NRHS (input) NRHS is INTEGER The number of right hand sides, i.e., the number of columns of the matrix B. NRHS >= 0. A (input) A is COMPLEX*16 array, dimension (LDA,N) The block diagonal matrix D and the multipliers used to obtain the factor U or L as computed by ZSYTRF. LDA (input) LDA is INTEGER The leading dimension of the array A. LDA >= max(1,N). IPIV (input) IPIV is INTEGER array, dimension (N) Details of the interchanges and the block structure of D as determined by ZSYTRF. B (input/output) B is COMPLEX*16 array, dimension (LDB,NRHS) On entry, the right hand side matrix B. On exit, the solution matrix X. LDB (input) LDB is INTEGER The leading dimension of the array B. LDB >= max(1,N). WORK (output) WORK is REAL array, dimension (N) INFO (output) INFO is INTEGER = 0: successful exit < 0: if INFO = -i, the i-th argument had an illegal value 7 Nov 2015 zsytrs2(3P)