TESTING/EIG/sbdt02.f(3)    Library Functions Manual    TESTING/EIG/sbdt02.f(3)

NAME
       TESTING/EIG/sbdt02.f

SYNOPSIS
   Functions/Subroutines
       subroutine sbdt02 (m, n, b, ldb, c, ldc, u, ldu, work, resid)
           SBDT02

Function/Subroutine Documentation
   subroutine sbdt02 (integer m, integer n, real, dimension( ldb, * ) b,
       integer ldb, real, dimension( ldc, * ) c, integer ldc, real, dimension(
       ldu, * ) u, integer ldu, real, dimension( * ) work, real resid)
       SBDT02

       Purpose:


            SBDT02 tests the change of basis C = U**H * B by computing the
            residual

               RESID = norm(B - U * C) / ( max(m,n) * norm(B) * EPS ),

            where B and C are M by N matrices, U is an M by M orthogonal matrix,
            and EPS is the machine precision.

       Parameters
           M

                     M is INTEGER
                     The number of rows of the matrices B and C and the order of
                     the matrix Q.

           N

                     N is INTEGER
                     The number of columns of the matrices B and C.

           B

                     B is REAL array, dimension (LDB,N)
                     The m by n matrix B.

           LDB

                     LDB is INTEGER
                     The leading dimension of the array B.  LDB >= max(1,M).

           C

                     C is REAL array, dimension (LDC,N)
                     The m by n matrix C, assumed to contain U**H * B.

           LDC

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

           U

                     U is REAL array, dimension (LDU,M)
                     The m by m orthogonal matrix U.

           LDU

                     LDU is INTEGER
                     The leading dimension of the array U.  LDU >= max(1,M).

           WORK

                     WORK is REAL array, dimension (M)

           RESID

                     RESID is REAL
                     RESID = norm(B - U * C) / ( max(m,n) * norm(B) * EPS ),

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Definition at line 111 of file sbdt02.f.

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

LAPACK                          Version 3.12.0         TESTING/EIG/sbdt02.f(3)