# cpotri.f - Man Page

SRC/cpotri.f

## Synopsis

### Functions/Subroutines

subroutine **cpotri** (uplo, n, a, lda, info)**CPOTRI**

## Function/Subroutine Documentation

### subroutine cpotri (character uplo, integer n, complex, dimension( lda, * ) a, integer lda, integer info)

**CPOTRI**

**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.

**Parameters***UPLO*UPLO is CHARACTER*1 = 'U': Upper triangle of A is stored; = 'L': Lower triangle of A is stored.

*N*N is INTEGER The order of the matrix A. N >= 0.

*A*A is 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*LDA is INTEGER The leading dimension of the array A. LDA >= max(1,N).

*INFO*INFO is 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.

**Author**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **94** of file **cpotri.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page cpotri(3) is an alias of cpotri.f(3).

Tue Nov 28 2023 12:08:41 Version 3.12.0 LAPACK