sorgl2(l) [redhat man page]

SORGL2(l)								 )								 SORGL2(l)

NAME

       SORGL2 - generate an m by n real matrix Q with orthonormal rows,

SYNOPSIS

       SUBROUTINE SORGL2( M, N, K, A, LDA, TAU, WORK, INFO )

	   INTEGER	  INFO, K, LDA, M, N

	   REAL 	  A( LDA, * ), TAU( * ), WORK( * )

PURPOSE

       SORGL2  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 reflec-
       tors of order n

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

       as returned by SGELQF.

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

       WORK    (workspace) REAL array, dimension (M)

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

LAPACK version 3.0						   15 June 2000 							 SORGL2(l)

sorgl2.f(3)							      LAPACK							       sorgl2.f(3)

NAME

       sorgl2.f -

SYNOPSIS

   Functions/Subroutines
       subroutine sorgl2 (M, N, K, A, LDA, TAU, WORK, INFO)
	   SORGL2

Function/Subroutine Documentation
   subroutine sorgl2 (integerM, integerN, integerK, real, dimension( lda, * )A, integerLDA, real, dimension( * )TAU, real, dimension( * )WORK,
       integerINFO)
       SORGL2

       Purpose:

	    SORGL2 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 SGELQF.

       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. N >= M.

	   K

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

	   A

		     A is REAL 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 SGELQF in the first k rows 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 REAL array, dimension (K)
		     TAU(i) must contain the scalar factor of the elementary
		     reflector H(i), as returned by SGELQF.

	   WORK

		     WORK is REAL array, dimension (M)

	   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.

       Date:
	   November 2011

       Definition at line 114 of file sorgl2.f.

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

Version 3.4.1							  Sun May 26 2013						       sorgl2.f(3)