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/home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/LIN/zqrt12.f(3) Library Functions Manual /home/abuild/rpmbuild/BUILD/lapack-3.12.0/TESTING/LIN/zqrt12.f(3)

NAME

/home/abuild/rpmbuild/BUILD/lapack-3.12.0/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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Version 3.12.0 LAPACK