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LAPACK version 3.0
dorgl2(3)

PURPOSE
  DORGL2 - generate an m by n real matrix Q with orthonormal rows,

SYNTAX
  SUBROUTINE DORGL2( M, N, K, A, LDA, TAU, WORK, INFO )

      INTEGER	     INFO, K, LDA, M, N

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

DESCRIPTION
  DORGL2 generates an m by n real matrix Q with orthonormal rows, which is
  defined as the first m rows of a product of k elementary reflectors of
  order n

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

  as returned by DGELQF.

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) DOUBLE PRECISION array, dimension (LDA,N)
	  On entry, the i-th row must contain the vector which defines the
	  elementary reflector H(i), for i = 1,2,...,k, as returned by DGELQF
	  in the first 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) DOUBLE PRECISION array, dimension (K)
	  TAU(i) must contain the scalar factor of the elementary reflector
	  H(i), as returned by DGELQF.

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

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