TESTING/LIN/dpot01.f(3)    Library Functions Manual    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.

LAPACK                          Version 3.12.0         TESTING/LIN/dpot01.f(3)