SRC/cpptri.f(3)            Library Functions Manual            SRC/cpptri.f(3)

NAME
       SRC/cpptri.f

SYNOPSIS
   Functions/Subroutines
       subroutine cpptri (uplo, n, ap, info)
           CPPTRI

Function/Subroutine Documentation
   subroutine cpptri (character uplo, integer n, complex, dimension( * ) ap,
       integer info)
       CPPTRI

       Purpose:


            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.

       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 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

                     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.

       Definition at line 92 of file cpptri.f.

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

LAPACK                          Version 3.12.0                 SRC/cpptri.f(3)