TESTING/LIN/sspt01.f(3)    Library Functions Manual    TESTING/LIN/sspt01.f(3)

NAME
       TESTING/LIN/sspt01.f

SYNOPSIS
   Functions/Subroutines
       subroutine sspt01 (uplo, n, a, afac, ipiv, c, ldc, rwork, resid)
           SSPT01

Function/Subroutine Documentation
   subroutine sspt01 (character uplo, integer n, real, dimension( * ) a, real,
       dimension( * ) afac, integer, dimension( * ) ipiv, real, dimension(
       ldc, * ) c, integer ldc, real, dimension( * ) rwork, real resid)
       SSPT01

       Purpose:


           !>
           !> SSPT01 reconstructs a symmetric indefinite packed 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 (N*(N+1)/2)
           !>          The original symmetric matrix A, stored as a packed
           !>          triangular matrix.
           !>

           AFAC

           !>          AFAC is REAL array, dimension (N*(N+1)/2)
           !>          The factored form of the matrix A, stored as a packed
           !>          triangular matrix.  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 SSPTRF.
           !>

           IPIV

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

           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 109 of file sspt01.f.

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

LAPACK                          Version 3.12.0         TESTING/LIN/sspt01.f(3)