TESTING/LIN/dgerqs.f(3)    Library Functions Manual    TESTING/LIN/dgerqs.f(3)

NAME
       TESTING/LIN/dgerqs.f

SYNOPSIS
   Functions/Subroutines
       subroutine dgerqs (m, n, nrhs, a, lda, tau, b, ldb, work, lwork, info)
           DGERQS

Function/Subroutine Documentation
   subroutine dgerqs (integer m, integer n, integer nrhs, double precision,
       dimension( lda, * ) a, integer lda, double precision, dimension( * )
       tau, double precision, dimension( ldb, * ) b, integer ldb, double
       precision, dimension( lwork ) work, integer lwork, integer info)
       DGERQS

       Purpose:


            Compute a minimum-norm solution
                min || A*X - B ||
            using the RQ factorization
                A = R*Q
            computed by DGERQF.

       Parameters
           M

                     M is INTEGER
                     The number of rows of the matrix A.  M >= 0.

           N

                     N is INTEGER
                     The number of columns of the matrix A.  N >= M >= 0.

           NRHS

                     NRHS is INTEGER
                     The number of columns of B.  NRHS >= 0.

           A

                     A is DOUBLE PRECISION array, dimension (LDA,N)
                     Details of the RQ factorization of the original matrix A as
                     returned by DGERQF.

           LDA

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

           TAU

                     TAU is DOUBLE PRECISION array, dimension (M)
                     Details of the orthogonal matrix Q.

           B

                     B is DOUBLE PRECISION array, dimension (LDB,NRHS)
                     On entry, the right hand side vectors for the linear system.
                     On exit, the solution vectors X.  Each solution vector
                     is contained in rows 1:N of a column of B.

           LDB

                     LDB is INTEGER
                     The leading dimension of the array B. LDB >= max(1,N).

           WORK

                     WORK is DOUBLE PRECISION array, dimension (LWORK)

           LWORK

                     LWORK is INTEGER
                     The length of the array WORK.  LWORK must be at least NRHS,
                     and should be at least NRHS*NB, where NB is the block size
                     for this environment.

           INFO

                     INFO is INTEGER
                     = 0: successful exit
                     < 0: if INFO = -i, the i-th argument had an illegal value

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Definition at line 120 of file dgerqs.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

LAPACK                          Version 3.12.0         TESTING/LIN/dgerqs.f(3)