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CentOS 7.0 - man page for dpptri (centos section 3)

dpptri.f(3)				      LAPACK				      dpptri.f(3)

NAME
       dpptri.f -

SYNOPSIS
   Functions/Subroutines
       subroutine dpptri (UPLO, N, AP, INFO)
	   DPPTRI

Function/Subroutine Documentation
   subroutine dpptri (characterUPLO, integerN, double precision, dimension( * )AP, integerINFO)
       DPPTRI

       Purpose:

	    DPPTRI 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 DPPTRF.

       Parameters:
	   UPLO

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

	   N

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

	   AP

		     AP is DOUBLE PRECISION array, dimension (N*(N+1)/2)
		     On entry, the triangular factor U or L from the Cholesky
		     factorization A = U**T*U or A = L*L**T, 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 (symmetric)
		     inverse of A, overwriting the input factor U or L.

	   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:
	   November 2011

       Definition at line 94 of file dpptri.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.2				 Tue Sep 25 2012			      dpptri.f(3)


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