DORG2L - generate an m by n real matrix Q with orthonormal
       columns,


SYNOPSIS

       SUBROUTINE DORG2L( M, N, K, A, LDA, TAU, WORK, INFO )

           INTEGER        INFO, K, LDA, M, N

           DOUBLE         PRECISION A( LDA, * ), TAU( * ),  WORK(
                          * )


PURPOSE

       DORG2L  generates an m by n real matrix Q with orthonormal
       columns, which is defined as the last n columns of a prod­
       uct of k elementary reflectors of order m

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

       as returned by DGEQLF.


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. M >= N >=
               0.

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

       A       (input/output) DOUBLE PRECISION array, dimension
               (LDA,N)
               On entry, the (n-k+i)-th column must  contain  the
               vector  which  defines  the  elementary  reflector
               H(i), for i = 1,2,...,k, as returned by DGEQLF  in
               the  last  k  columns 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) DOUBLE PRECISION array, dimension (K)
               TAU(i)  must contain the scalar factor of the ele­
               mentary reflector H(i), as returned by DGEQLF.

       WORK    (workspace) DOUBLE PRECISION array, dimension (N)

       INFO    (output) INTEGER
               = 0: successful exit

               gal value


Man(1) output converted with man2html