(S|D|C|Z)POTRI¶

Single, double, single complex, and double complex POTRI.

Description¶

Computes the inverse of a Hermitian positive definite matrix using Cholesky factorization.

$\fvar{A} = \herm{\fvar{U}} \mult \fvar{U}$

$\fvar{A} = \fvar{L} \mult \herm{\fvar{L}}$

LAPACK Interface¶

void spotri(const char *UPLO, const qml_long *N, float *A, const qml_long *LDA,
    qml_long *INFO);

void dpotri(const char *UPLO, const qml_long *N, double *A, const qml_long *LDA,
    qml_long *INFO);

void cpotri(const char *UPLO, const qml_long *N, qml_single_complex *A,
    const qml_long *LDA, qml_long *INFO);

void zpotri(const char *UPLO, const qml_long *N, qml_double_complex *A,
    const qml_long *LDA, qml_long *INFO);

Arguments¶

UPLO	Set to ‘U’ for upper triangular factorization, ‘L’ for lower
N	Number of rows and columns of A
A	Matrix of size N x N containing Cholesky factorization as output by POTRF
LDA	Leading dimension of A
INFO	0 on success, <0 for bad arguments, >0 if no inverse