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.