TESTING/LIN/ssyt01.f(3)    Library Functions Manual    TESTING/LIN/ssyt01.f(3)

NAME
       TESTING/LIN/ssyt01.f

SYNOPSIS
   Functions/Subroutines
       subroutine ssyt01 (uplo, n, a, lda, afac, ldafac, ipiv, c, ldc, rwork,
           resid)
           SSYT01

Function/Subroutine Documentation
   subroutine ssyt01 (character uplo, integer n, real, dimension( lda, * ) a,
       integer lda, real, dimension( ldafac, * ) afac, integer ldafac,
       integer, dimension( * ) ipiv, real, dimension( ldc, * ) c, integer ldc,
       real, dimension( * ) rwork, real resid)
       SSYT01

       Purpose:


           !>
           !> SSYT01 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 REAL 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 REAL 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 SSYTRF.
           !>

           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 SSYTRF.
           !>

           C

           !>          C is REAL array, dimension (LDC,N)
           !>

           LDC

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

           RWORK

           !>          RWORK is REAL array, dimension (N)
           !>

           RESID

           !>          RESID is REAL
           !>          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 ssyt01.f.

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

LAPACK                          Version 3.12.0         TESTING/LIN/ssyt01.f(3)