TESTING/LIN/spot01.f(3)    Library Functions Manual    TESTING/LIN/spot01.f(3)

NAME
       TESTING/LIN/spot01.f

SYNOPSIS
   Functions/Subroutines
       subroutine spot01 (uplo, n, a, lda, afac, ldafac, rwork, resid)
           SPOT01

Function/Subroutine Documentation
   subroutine spot01 (character uplo, integer n, real, dimension( lda, * ) a,
       integer lda, real, dimension( ldafac, * ) afac, integer ldafac, real,
       dimension( * ) rwork, real resid)
       SPOT01

       Purpose:


            SPOT01 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 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)
                     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 REAL array, dimension (N)

           RESID

                     RESID is REAL
                     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 spot01.f.

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

LAPACK                          Version 3.12.0         TESTING/LIN/spot01.f(3)