CXML
        	    
LAPACK version 3.0
spotri(3)

PURPOSE
  SPOTRI - compute 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

SYNTAX
  SUBROUTINE SPOTRI( UPLO, N, A, LDA, INFO )

      CHARACTER	     UPLO

      INTEGER	     INFO, LDA, N

      REAL	     A( LDA, * )

DESCRIPTION
  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.

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) 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	  (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.