Provided by: liblapack-doc_3.3.1-1_all

#### NAME

```       LAPACK-3  -  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

```

#### 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
factorization 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, overwriting 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.

LAPACK routine (version 3.3.1)             April 2011                            CPOTRI(3lapack)
```