(S|D|C|Z)GETRS¶

Single, double, single complex, and double complex GETRS.

Description¶

Uses LU decomposition to solve one of the equations:

$A \mult X = B$

$\trans{A} \mult X = B$

$\herm{A} \mult X = B$

LAPACK Interface¶

void sgetrs(const char *TRANS, const qml_long *N, const qml_long *NRHS, float *A,
    const qml_long *LDA, qml_long *IPIV, float *B, const qml_long *LDB,
    qml_long *INFO);

void dgetrs(const char *TRANS, const qml_long *N, const qml_long *NRHS, double *A,
    const qml_long *LDA, qml_long *IPIV, double *B, const qml_long *LDB,
    qml_long *INFO);

void cgetrs(const char *TRANS, const qml_long *N, const qml_long *NRHS,
    qml_single_complex *A, const qml_long *LDA, qml_long *IPIV,
    qml_single_complex *B, const qml_long *LDB, qml_long *INFO);

void zgetrs(const char *TRANS, const qml_long *N, const qml_long *NRHS,
    qml_double_complex *A, const qml_long *LDA, qml_long *IPIV,
    qml_double_complex *B, const qml_long *LDB, qml_long *INFO);

Arguments¶

TRANS	Specifies transform option for A, ‘N’ for none, ‘T’ for transpose, ‘C’ for conjugate transpose
N	Number of linear equations, order of A
NRHS	Number of right hand sides, number of columns of B
A	Matrix of size N x N
LDA	Leading dimension of A
IPIV	Pivot indices indicating rows to interchange
B	Matrix of size N x NRHS, overwritten with solutions
LDB	Leading dimension of B
INFO	0 on success