ZUNGR2  -  generate  an  m  by  n  complex  matrix  Q with
       orthonormal rows,


SYNOPSIS

       SUBROUTINE ZUNGR2( M, N, K, A, LDA, TAU, WORK, INFO )

           INTEGER        INFO, K, LDA, M, N

           COMPLEX*16     A( LDA, * ), TAU( * ), WORK( * )


PURPOSE

       ZUNGR2 generates an m by n complex matrix Q with orthonor­
       mal rows, which is defined as the last m rows of a product
       of k elementary reflectors of order n

             Q  =  H(1)' H(2)' . . . H(k)'

       as returned by ZGERQF.


ARGUMENTS

       M       (input) INTEGER
               The number of rows of the matrix Q. M >= 0.

       N       (input) INTEGER
               The number of columns of the matrix Q. N >= M.

       K       (input) INTEGER
               The number of elementary reflectors whose  product
               defines the matrix Q. M >= K >= 0.

       A       (input/output) COMPLEX*16 array, dimension (LDA,N)
               On entry, the (m-k+i)-th row must contain the vec­
               tor  which  defines the elementary reflector H(i),
               for i = 1,2,...,k, as returned by  ZGERQF  in  the
               last k rows of its array argument A.  On exit, the
               m-by-n matrix Q.

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

       TAU     (input) COMPLEX*16 array, dimension (K)
               TAU(i)  must contain the scalar factor of the ele­
               mentary reflector H(i), as returned by ZGERQF.

       WORK    (workspace) COMPLEX*16 array, dimension (M)

       INFO    (output) INTEGER
               = 0: successful exit
               < 0: if INFO = -i, the i-th argument has an  ille­
               gal value


Man(1) output converted with man2html