TESTING/LIN/dsyt01_rook.f(3)                          Library Functions Manual

NAME
       TESTING/LIN/dsyt01_rook.f

SYNOPSIS
   Functions/Subroutines
       subroutine dsyt01_rook (uplo, n, a, lda, afac, ldafac, ipiv, c, ldc,
           rwork, resid)
           DSYT01_ROOK

Function/Subroutine Documentation
   subroutine dsyt01_rook (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_ROOK

       Purpose:


            DSYT01_ROOK 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_ROOK.

           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_ROOK.

           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_rook.f.

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

LAPACK                          Version 3.12.0    TESTING/LIN/dsyt01_rook.f(3)