NAME

TESTING/LIN/cqrt12.f

SYNOPSIS

Functions/Subroutines

real function cqrt12 (m, n, a, lda, s, work, lwork, rwork)
CQRT12

Function/Subroutine Documentation

real function cqrt12 (integer m, integer n, complex, dimension( lda, * ) a, integer lda, real, dimension( * ) s, complex, dimension( lwork ) work, integer lwork, real, dimension( * ) rwork)

CQRT12

Purpose:

 CQRT12 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 is INTEGER
          The number of rows of the matrix A.

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

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

WORK

          WORK is COMPLEX 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 REAL array, dimension (4*min(M,N))

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 95 of file cqrt12.f.

Author

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Version 3.12.0

LAPACK