Provided by: liblapack-doc_3.3.1-1_all bug

NAME

       LAPACK-3  -  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

SYNOPSIS

       SUBROUTINE CPPTRI( UPLO, N, AP, INFO )

           CHARACTER      UPLO

           INTEGER        INFO, N

           COMPLEX        AP( * )

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.

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.

 LAPACK routine (version 3.3.1)             April 2011                            CPPTRI(3lapack)