dqrt12.f - Man Page

double precision function dqrt12 (m, n, a, lda, s, work, lwork)
DQRT12

DQRT12

Purpose:

 DQRT12 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 DOUBLE PRECISION 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 DOUBLE PRECISION 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 dqrt12.f.