SRC/cung2r.f(3)            Library Functions Manual            SRC/cung2r.f(3)

NAME
       SRC/cung2r.f

SYNOPSIS
   Functions/Subroutines
       subroutine cung2r (m, n, k, a, lda, tau, work, info)
           CUNG2R

Function/Subroutine Documentation
   subroutine cung2r (integer m, integer n, integer k, complex, dimension(
       lda, * ) a, integer lda, complex, dimension( * ) tau, complex,
       dimension( * ) work, integer info)
       CUNG2R

       Purpose:


           !>
           !> CUNG2R 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 CGEQRF.
           !>

       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 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 CGEQRF 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 array, dimension (K)
           !>          TAU(i) must contain the scalar factor of the elementary
           !>          reflector H(i), as returned by CGEQRF.
           !>

           WORK

           !>          WORK is COMPLEX 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 cung2r.f.

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

LAPACK                          Version 3.12.0                 SRC/cung2r.f(3)