spotri.f (3)  Linux Man Pages
NAME
spotri.f 
SYNOPSIS
Functions/Subroutines
subroutine spotri (UPLO, N, A, LDA, INFO)
SPOTRI
Function/Subroutine Documentation
subroutine spotri (characterUPLO, integerN, real, dimension( lda, * )A, integerLDA, integerINFO)
SPOTRI
Purpose:

SPOTRI computes the inverse of a real symmetric positive definite matrix A using the Cholesky factorization A = U**T*U or A = L*L**T computed by SPOTRF.
Parameters:

UPLO
UPLO is CHARACTER*1 = 'U': Upper triangle of A is stored; = 'L': Lower triangle of A is stored.
NN is INTEGER The order of the matrix A. N >= 0.
AA is REAL array, dimension (LDA,N) On entry, the triangular factor U or L from the Cholesky factorization A = U**T*U or A = L*L**T, as computed by SPOTRF. On exit, the upper or lower triangle of the (symmetric) inverse of A, overwriting the input factor U or L.
LDALDA is INTEGER The leading dimension of the array A. LDA >= max(1,N).
INFOINFO is INTEGER = 0: successful exit < 0: if INFO = i, the ith 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.
Date:
 November 2011
Definition at line 96 of file spotri.f.
Author
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