CPOTRI(l) LAPACK routine (version 1.1) CPOTRI(l)
NAME
CPOTRI - compute the inverse of a complex Hermitian positive definite
matrix A using the Cholesky factorization A = U**H*U or A = L*L**H computed
by CPOTRF
SYNOPSIS
SUBROUTINE CPOTRI( UPLO, N, A, LDA, INFO )
CHARACTER UPLO
INTEGER INFO, LDA, N
COMPLEX A( LDA, * )
PURPOSE
CPOTRI computes the inverse of a complex Hermitian positive definite matrix
A using the Cholesky factorization A = U**H*U or A = L*L**H computed by
CPOTRF.
ARGUMENTS
UPLO (input) CHARACTER*1
= 'U': Upper triangle of A is stored;
= 'L': Lower triangle of A is stored.
N (input) INTEGER
The order of the matrix A. N >= 0.
A (input/output) COMPLEX array, dimension (LDA,N)
On entry, the triangular factor U or L from the Cholesky factoriza-
tion A = U**H*U or A = L*L**H, as computed by CPOTRF. On exit, the
upper or lower triangle of the (Hermitian) inverse of A, overwrit-
ing the input factor U or L.
LDA (input) INTEGER
The leading dimension of the array A. LDA >= max(1,N).
INFO (output) INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
> 0: if INFO = i, the (i,i) element of the factor U or L is zero,
and the inverse could not be computed.
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