spotri.f man page

spotri.f

Synopsis

Functions/Subroutines

subroutine spotri (UPLO, N, A, LDA, INFO)
SPOTRI

Function/Subroutine Documentation

subroutine spotri (character UPLO, integer N, real, dimension( lda, * ) A, integer LDA, integer INFO)

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.

N

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

A

          A 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.

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.

Date:

December 2016

Definition at line 97 of file spotri.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.

Referenced By

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

Tue Nov 14 2017 Version 3.8.0 LAPACK