TESTING/LIN/dppt03.f(3)

NAME
TESTING/LIN/dppt03.f

SYNOPSIS

  Functions/Subroutines
subroutine dppt03 (uplo, n, a, ainv, work, ldwork, rwork, rcond, resid)
DPPT03

Function/Subroutine Documentation

  subroutine dppt03 (character uplo, integer n, double precision, dimension( * ) a, double precision, dimension( * ) ainv, double precision, dimension( ldwork, * ) work, integer ldwork, double precision, dimension( * ) rwork, double precision rcond, double precision resid)

DPPT03

Purpose:

     DPPT03 computes the residual for a symmetric packed matrix times its
     inverse:
        norm( I - A*AINV ) / ( N * norm(A) * norm(AINV) * EPS ),
     where EPS is the machine epsilon.

Parameters
    UPLO

              UPLO is CHARACTER*1
              Specifies whether the upper or lower triangular part of the
              symmetric matrix A is stored:
              = 'U':  Upper triangular
              = 'L':  Lower triangular

    N

              N is INTEGER
              The number of rows and columns of the matrix A.  N >= 0.

    A

              A is DOUBLE PRECISION array, dimension (N*(N+1)/2)
              The original symmetric matrix A, stored as a packed
              triangular matrix.

    AINV

              AINV is DOUBLE PRECISION array, dimension (N*(N+1)/2)
              The (symmetric) inverse of the matrix A, stored as a packed
              triangular matrix.

    WORK

              WORK is DOUBLE PRECISION array, dimension (LDWORK,N)

    LDWORK

              LDWORK is INTEGER
              The leading dimension of the array WORK.  LDWORK >= max(1,N).

    RWORK

              RWORK is DOUBLE PRECISION array, dimension (N)

    RCOND

              RCOND is DOUBLE PRECISION
              The reciprocal of the condition number of A, computed as
              ( 1/norm(A) ) / norm(AINV).

    RESID

              RESID is DOUBLE PRECISION
              norm(I - A*AINV) / ( N * norm(A) * norm(AINV) * EPS )

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 108 of file dppt03.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.