hetri

chetri

Functions

void chetri(
    const char*          uplo,
    const INT            n,
          c64*  restrict A,
    const INT            lda,
    const INT*  restrict ipiv,
          c64*  restrict work,
          INT*           info
);

void chetri(const char *uplo, const INT n, c64 *restrict A, const INT lda, const INT *restrict ipiv, c64 *restrict work, INT *info)

CHETRI computes the inverse of a complex Hermitian indefinite matrix A using the factorization A = U*D*U**H or A = L*D*L**H computed by CHETRF.

Parameters

in

uplo

= ‘U’: Upper triangular, A = U*D*U**H = ‘L’: Lower triangular, A = L*D*L**H

in

n

The order of the matrix A. n >= 0.

inout

A

Complex*16 array, dimension (lda, n). On entry, the factored matrix from CHETRF. On exit, the (Hermitian) inverse of the original matrix.

in

lda

The leading dimension of A. lda >= max(1, n).

in

ipiv

Integer array, dimension (n). The pivot indices from CHETRF.

out

work

Complex*16 array, dimension (n).

out

info

• = 0: successful exit

• < 0: if info = -i, the i-th argument had an illegal value

• > 0: if info = i, D(i,i) = 0; the matrix is singular.

zhetri

Functions

void zhetri(
    const char*          uplo,
    const INT            n,
          c128* restrict A,
    const INT            lda,
    const INT*  restrict ipiv,
          c128* restrict work,
          INT*           info
);

void zhetri(const char *uplo, const INT n, c128 *restrict A, const INT lda, const INT *restrict ipiv, c128 *restrict work, INT *info)

ZHETRI computes the inverse of a complex Hermitian indefinite matrix A using the factorization A = U*D*U**H or A = L*D*L**H computed by ZHETRF.

Parameters

in

uplo

= ‘U’: Upper triangular, A = U*D*U**H = ‘L’: Lower triangular, A = L*D*L**H

in

n

The order of the matrix A. n >= 0.

inout

A

Complex*16 array, dimension (lda, n). On entry, the factored matrix from ZHETRF. On exit, the (Hermitian) inverse of the original matrix.

in

lda

The leading dimension of A. lda >= max(1, n).

in

ipiv

Integer array, dimension (n). The pivot indices from ZHETRF.

out

work

Complex*16 array, dimension (n).

out

info

• = 0: successful exit

• < 0: if info = -i, the i-th argument had an illegal value

• > 0: if info = i, D(i,i) = 0; the matrix is singular.