TESTING/LIN/zqrt12.f(3)

NAME
TESTING/LIN/zqrt12.f

SYNOPSIS

  Functions/Subroutines
double precision function zqrt12 (m, n, a, lda, s, work, lwork, rwork)
ZQRT12

Function/Subroutine Documentation

  double precision function zqrt12 (integer m, integer n, complex*16, dimension( lda, * ) a, integer lda, double precision, dimension( * ) s, complex*16, dimension( lwork ) work, integer lwork, double precision, dimension( * ) rwork)

ZQRT12

Purpose:

    !>
    !> ZQRT12 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 COMPLEX*16 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 DOUBLE PRECISION array, dimension (min(M,N))
    !>          The singular values of the matrix A.
    !>

    WORK

    !>          WORK is COMPLEX*16 array, dimension (LWORK)
    !>

    LWORK

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

    RWORK

    !>          RWORK is DOUBLE PRECISION array, dimension (2*min(M,N))
    !>

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 95 of file zqrt12.f.

Author

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