TESTING/LIN/dsyt01.f(3)    Library Functions Manual    TESTING/LIN/dsyt01.f(3)

NAME
       TESTING/LIN/dsyt01.f

SYNOPSIS
   Functions/Subroutines
       subroutine dsyt01 (uplo, n, a, lda, afac, ldafac, ipiv, c, ldc, rwork,
           resid)
           DSYT01

Function/Subroutine Documentation
   subroutine dsyt01 (character uplo, integer n, double precision, dimension(
       lda, * ) a, integer lda, double precision, dimension( ldafac, * ) afac,
       integer ldafac, integer, dimension( * ) ipiv, double precision,
       dimension( ldc, * ) c, integer ldc, double precision, dimension( * )
       rwork, double precision resid)
       DSYT01

       Purpose:


           !>
           !> DSYT01 reconstructs a symmetric indefinite matrix A from its
           !> block L*D*L' or U*D*U' factorization and computes the residual
           !>    norm( C - A ) / ( N * norm(A) * EPS ),
           !> where C is the reconstructed matrix and 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)
           !>          The factored form of the matrix A.  AFAC contains the block
           !>          diagonal matrix D and the multipliers used to obtain the
           !>          factor L or U from the block L*D*L' or U*D*U' factorization
           !>          as computed by DSYTRF.
           !>

           LDAFAC

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

           IPIV

           !>          IPIV is INTEGER array, dimension (N)
           !>          The pivot indices from DSYTRF.
           !>

           C

           !>          C is DOUBLE PRECISION array, dimension (LDC,N)
           !>

           LDC

           !>          LDC is INTEGER
           !>          The leading dimension of the array C.  LDC >= max(1,N).
           !>

           RWORK

           !>          RWORK is DOUBLE PRECISION array, dimension (N)
           !>

           RESID

           !>          RESID is DOUBLE PRECISION
           !>          If UPLO = 'L', norm(L*D*L' - A) / ( N * norm(A) * EPS )
           !>          If UPLO = 'U', norm(U*D*U' - A) / ( N * norm(A) * EPS )
           !>

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Definition at line 122 of file dsyt01.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

LAPACK                          Version 3.12.0         TESTING/LIN/dsyt01.f(3)