TESTING/LIN/dpot01.f(3)

NAME
TESTING/LIN/dpot01.f

SYNOPSIS

  Functions/Subroutines
subroutine dpot01 (uplo, n, a, lda, afac, ldafac, rwork, resid)
DPOT01

Function/Subroutine Documentation

  subroutine dpot01 (character uplo, integer n, double precision, dimension( lda, * ) a, integer lda, double precision, dimension( ldafac, * ) afac, integer ldafac, double precision, dimension( * ) rwork, double precision resid)

DPOT01

Purpose:

     DPOT01 reconstructs a symmetric positive definite matrix  A  from
     its L*L' or U'*U factorization and computes the residual
        norm( L*L' - A ) / ( N * norm(A) * EPS ) or
        norm( U'*U - A ) / ( N * norm(A) * 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 (LDA,N)
              The original symmetric matrix A.

    LDA

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

    AFAC

              AFAC is DOUBLE PRECISION array, dimension (LDAFAC,N)
              On entry, the factor L or U from the L * L**T or U**T * U
              factorization of A.
              Overwritten with the reconstructed matrix, and then with
              the difference L * L**T - A (or U**T * U - A).

    LDAFAC

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

    RWORK

              RWORK is DOUBLE PRECISION array, dimension (N)

    RESID

              RESID is DOUBLE PRECISION
              If UPLO = 'L', norm(L * L**T - A) / ( N * norm(A) * EPS )
              If UPLO = 'U', norm(U**T * U - A) / ( N * norm(A) * EPS )

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 103 of file dpot01.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.