zgesv - compute the solution to a complex system of linear equations A * X = B,
SUBROUTINE ZGESV( N, NRHS, A, LDA, IPIVOT, B, LDB, INFO) DOUBLE COMPLEX A(LDA,*), B(LDB,*) INTEGER N, NRHS, LDA, LDB, INFO INTEGER IPIVOT(*)
SUBROUTINE ZGESV_64( N, NRHS, A, LDA, IPIVOT, B, LDB, INFO) DOUBLE COMPLEX A(LDA,*), B(LDB,*) INTEGER*8 N, NRHS, LDA, LDB, INFO INTEGER*8 IPIVOT(*)
SUBROUTINE GESV( [N], [NRHS], A, [LDA], IPIVOT, B, [LDB], [INFO]) COMPLEX(8), DIMENSION(:,:) :: A, B INTEGER :: N, NRHS, LDA, LDB, INFO INTEGER, DIMENSION(:) :: IPIVOT
SUBROUTINE GESV_64( [N], [NRHS], A, [LDA], IPIVOT, B, [LDB], [INFO]) COMPLEX(8), DIMENSION(:,:) :: A, B INTEGER(8) :: N, NRHS, LDA, LDB, INFO INTEGER(8), DIMENSION(:) :: IPIVOT
#include <sunperf.h>
void zgesv(int n, int nrhs, doublecomplex *a, int lda, int *ipivot, doublecomplex *b, int ldb, int *info);
void zgesv_64(long n, long nrhs, doublecomplex *a, long lda, long *ipivot, doublecomplex *b, long ldb, long *info);
zgesv computes the solution to a complex system of linear equations A * X = B, where A is an N-by-N matrix and X and B are N-by-NRHS matrices.
The LU decomposition with partial pivoting and row interchanges is used to factor A as
A = P * L * U,
where P is a permutation matrix, L is unit lower triangular, and U is upper triangular. The factored form of A is then used to solve the system of equations A * X = B.
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
> 0: if INFO = i, U(i,i) is exactly zero. The factorization has been completed, but the factor U is exactly singular, so the solution could not be computed.