SRC/DEPRECATED/zgeqrs.f(3)                            Library Functions Manual

NAME
       SRC/DEPRECATED/zgeqrs.f

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

Function/Subroutine Documentation
   subroutine zgeqrs (integer m, integer n, integer nrhs, complex*16,
       dimension( lda, * ) a, integer lda, complex*16, dimension( * ) tau,
       complex*16, dimension( ldb, * ) b, integer ldb, complex*16, dimension(
       lwork ) work, integer lwork, integer info)
       ZGEQRS

       Purpose:


            Solve the least squares problem
                min || A*X - B ||
            using the QR factorization
                A = Q*R
            computed by ZGEQRF.

       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.  M >= N >= 0.

           NRHS

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

           A

                     A is COMPLEX*16 array, dimension (LDA,N)
                     Details of the QR factorization of the original matrix A as
                     returned by ZGEQRF.

           LDA

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

           TAU

                     TAU is COMPLEX*16 array, dimension (N)
                     Details of the orthogonal matrix Q.

           B

                     B is COMPLEX*16 array, dimension (LDB,NRHS)
                     On entry, the m-by-nrhs right hand side matrix B.
                     On exit, the n-by-nrhs solution matrix X.

           LDB

                     LDB is INTEGER
                     The leading dimension of the array B. LDB >= M.

           WORK

                     WORK is COMPLEX*16 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 119 of file zgeqrs.f.

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

LAPACK                          Version 3.12.0      SRC/DEPRECATED/zgeqrs.f(3)