TESTING/LIN/spot03.f(3)    Library Functions Manual    TESTING/LIN/spot03.f(3)

NAME
       TESTING/LIN/spot03.f

SYNOPSIS
   Functions/Subroutines
       subroutine spot03 (uplo, n, a, lda, ainv, ldainv, work, ldwork, rwork,
           rcond, resid)
           SPOT03

Function/Subroutine Documentation
   subroutine spot03 (character uplo, integer n, real, dimension( lda, * ) a,
       integer lda, real, dimension( ldainv, * ) ainv, integer ldainv, real,
       dimension( ldwork, * ) work, integer ldwork, real, dimension( * )
       rwork, real rcond, real resid)
       SPOT03

       Purpose:


            SPOT03 computes the residual for a symmetric matrix times its
            inverse:
               norm( I - A*AINV ) / ( N * norm(A) * norm(AINV) * 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)

           AINV

                     AINV is REAL array, dimension (LDAINV,N)
                     On entry, the inverse of the matrix A, stored as a symmetric
                     matrix in the same format as A.
                     In this version, AINV is expanded into a full matrix and
                     multiplied by A, so the opposing triangle of AINV will be
                     changed; i.e., if the upper triangular part of AINV is
                     stored, the lower triangular part will be used as work space.

           LDAINV

                     LDAINV is INTEGER
                     The leading dimension of the array AINV.  LDAINV >= max(1,N).

           WORK

                     WORK is REAL array, dimension (LDWORK,N)

           LDWORK

                     LDWORK is INTEGER
                     The leading dimension of the array WORK.  LDWORK >= max(1,N).

           RWORK

                     RWORK is REAL array, dimension (N)

           RCOND

                     RCOND is REAL
                     The reciprocal of the condition number of A, computed as
                     ( 1/norm(A) ) / norm(AINV).

           RESID

                     RESID is REAL
                     norm(I - A*AINV) / ( N * norm(A) * norm(AINV) * EPS )

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Definition at line 123 of file spot03.f.

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

LAPACK                          Version 3.12.0         TESTING/LIN/spot03.f(3)