TESTING/LIN/sqrt12.f(3)

NAME
TESTING/LIN/sqrt12.f

SYNOPSIS

  Functions/Subroutines
real function sqrt12 (m, n, a, lda, s, work, lwork)
SQRT12

Function/Subroutine Documentation

  real function sqrt12 (integer m, integer n, real, dimension( lda, * ) a, integer lda, real, dimension( * ) s, real, dimension( lwork ) work, integer lwork)

SQRT12

Purpose:

    !>
    !> SQRT12 computes the singular values `svlues' of the upper trapezoid
    !> of A(1:M,1:N) and returns the ratio
    !>
    !>      || svlues - s ||/(||s||*eps*max(M,N))
    !>

Parameters
    M

    !>          M is INTEGER
    !>          The number of rows of the matrix A.
    !>

    N

    !>          N is INTEGER
    !>          The number of columns of the matrix A.
    !>

    A

    !>          A is REAL array, dimension (LDA,N)
    !>          The M-by-N matrix A. Only the upper trapezoid is referenced.
    !>

    LDA

    !>          LDA is INTEGER
    !>          The leading dimension of the array A.
    !>

    S

    !>          S is REAL array, dimension (min(M,N))
    !>          The singular values of the matrix A.
    !>

    WORK

    !>          WORK is REAL array, dimension (LWORK)
    !>

    LWORK

    !>          LWORK is INTEGER
    !>          The length of the array WORK. LWORK >= max(M*N + 4*min(M,N) +
    !>          max(M,N), M*N+2*MIN( M, N )+4*N).
    !>

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 88 of file sqrt12.f.

Author

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