SRC/zung2r.f(3)            Library Functions Manual            SRC/zung2r.f(3)

NAME
       SRC/zung2r.f

SYNOPSIS
   Functions/Subroutines
       subroutine zung2r (m, n, k, a, lda, tau, work, info)
           ZUNG2R

Function/Subroutine Documentation
   subroutine zung2r (integer m, integer n, integer k, complex*16, dimension(
       lda, * ) a, integer lda, complex*16, dimension( * ) tau, complex*16,
       dimension( * ) work, integer info)
       ZUNG2R

       Purpose:


           !>
           !> ZUNG2R generates an m by n complex matrix Q with orthonormal columns,
           !> which is defined as the first n columns of a product of k elementary
           !> reflectors of order m
           !>
           !>       Q  =  H(1) H(2) . . . H(k)
           !>
           !> as returned by ZGEQRF.
           !>

       Parameters
           M

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

           N

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

           K

           !>          K is INTEGER
           !>          The number of elementary reflectors whose product defines the
           !>          matrix Q. N >= K >= 0.
           !>

           A

           !>          A is COMPLEX*16 array, dimension (LDA,N)
           !>          On entry, the i-th column must contain the vector which
           !>          defines the elementary reflector H(i), for i = 1,2,...,k, as
           !>          returned by ZGEQRF in the first k columns of its array
           !>          argument A.
           !>          On exit, the m by n matrix Q.
           !>

           LDA

           !>          LDA is INTEGER
           !>          The first dimension of the array A. LDA >= max(1,M).
           !>

           TAU

           !>          TAU is COMPLEX*16 array, dimension (K)
           !>          TAU(i) must contain the scalar factor of the elementary
           !>          reflector H(i), as returned by ZGEQRF.
           !>

           WORK

           !>          WORK is COMPLEX*16 array, dimension (N)
           !>

           INFO

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

       Author
           Univ. of Tennessee


           Univ. of California Berkeley


           Univ. of Colorado Denver


           NAG Ltd.

       Definition at line 113 of file zung2r.f.

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

LAPACK                          Version 3.12.0                 SRC/zung2r.f(3)