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.