TESTING/EIG/sget54.f(3)    Library Functions Manual    TESTING/EIG/sget54.f(3)

NAME
       TESTING/EIG/sget54.f

SYNOPSIS
   Functions/Subroutines
       subroutine sget54 (n, a, lda, b, ldb, s, lds, t, ldt, u, ldu, v, ldv,
           work, result)
           SGET54

Function/Subroutine Documentation
   subroutine sget54 (integer n, real, dimension( lda, * ) a, integer lda,
       real, dimension( ldb, * ) b, integer ldb, real, dimension( lds, * ) s,
       integer lds, real, dimension( ldt, * ) t, integer ldt, real, dimension(
       ldu, * ) u, integer ldu, real, dimension( ldv, * ) v, integer ldv,
       real, dimension( * ) work, real result)
       SGET54

       Purpose:


           !>
           !> SGET54 checks a generalized decomposition of the form
           !>
           !>          A = U*S*V'  and B = U*T* V'
           !>
           !> where ' means transpose and U and V are orthogonal.
           !>
           !> Specifically,
           !>
           !>  RESULT = ||( A - U*S*V', B - U*T*V' )|| / (||( A, B )||*n*ulp )
           !>

       Parameters
           N

           !>          N is INTEGER
           !>          The size of the matrix.  If it is zero, SGET54 does nothing.
           !>          It must be at least zero.
           !>

           A

           !>          A is REAL array, dimension (LDA, N)
           !>          The original (unfactored) matrix A.
           !>

           LDA

           !>          LDA is INTEGER
           !>          The leading dimension of A.  It must be at least 1
           !>          and at least N.
           !>

           B

           !>          B is REAL array, dimension (LDB, N)
           !>          The original (unfactored) matrix B.
           !>

           LDB

           !>          LDB is INTEGER
           !>          The leading dimension of B.  It must be at least 1
           !>          and at least N.
           !>

           S

           !>          S is REAL array, dimension (LDS, N)
           !>          The factored matrix S.
           !>

           LDS

           !>          LDS is INTEGER
           !>          The leading dimension of S.  It must be at least 1
           !>          and at least N.
           !>

           T

           !>          T is REAL array, dimension (LDT, N)
           !>          The factored matrix T.
           !>

           LDT

           !>          LDT is INTEGER
           !>          The leading dimension of T.  It must be at least 1
           !>          and at least N.
           !>

           U

           !>          U is REAL array, dimension (LDU, N)
           !>          The orthogonal matrix on the left-hand side in the
           !>          decomposition.
           !>

           LDU

           !>          LDU is INTEGER
           !>          The leading dimension of U.  LDU must be at least N and
           !>          at least 1.
           !>

           V

           !>          V is REAL array, dimension (LDV, N)
           !>          The orthogonal matrix on the left-hand side in the
           !>          decomposition.
           !>

           LDV

           !>          LDV is INTEGER
           !>          The leading dimension of V.  LDV must be at least N and
           !>          at least 1.
           !>

           WORK

           !>          WORK is REAL array, dimension (3*N**2)
           !>

           RESULT

           !>          RESULT is REAL
           !>          The value RESULT, It is currently limited to 1/ulp, to
           !>          avoid overflow. Errors are flagged by RESULT=10/ulp.
           !>

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Definition at line 154 of file sget54.f.

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

LAPACK                          Version 3.12.0         TESTING/EIG/sget54.f(3)