CXML
        	    
LAPACK version 3.0
cpptri(3)

PURPOSE
  CPPTRI - compute 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 CPPTRF

SYNTAX
  SUBROUTINE CPPTRI( UPLO, N, AP, INFO )

      CHARACTER	     UPLO

      INTEGER	     INFO, N

      COMPLEX	     AP( * )

DESCRIPTION
  CPPTRI 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
  CPPTRF.

ARGUMENTS
  UPLO	  (input) CHARACTER*1
	  = 'U':  Upper triangular factor is stored in AP;
	  = 'L':  Lower triangular factor is stored in AP.

  N	  (input) INTEGER
	  The order of the matrix A.  N >= 0.

  AP	  (input/output) COMPLEX array, dimension (N*(N+1)/2)
	  On entry, the triangular factor U or L from the Cholesky
	  factorization A = U**H*U or A = L*L**H, packed columnwise as a
	  linear array.	 The j-th column of U or L is stored in the array AP
	  as follows: if UPLO = 'U', AP(i + (j-1)*j/2) = U(i,j) for 1<=i<=j;
	  if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = L(i,j) for j<=i<=n.

	  On exit, the upper or lower triangle of the (Hermitian) inverse of
	  A, overwriting the input factor U or L.

  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.