Unix/Linux Go Back    


CentOS 7.0 - man page for zungl2 (centos section 3)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


zungl2.f(3)				      LAPACK				      zungl2.f(3)

NAME
       zungl2.f -

SYNOPSIS
   Functions/Subroutines
       subroutine zungl2 (M, N, K, A, LDA, TAU, WORK, INFO)
	   ZUNGL2 generates all or part of the unitary matrix Q from an LQ factorization
	   determined by cgelqf (unblocked algorithm).

Function/Subroutine Documentation
   subroutine zungl2 (integerM, integerN, integerK, complex*16, dimension( lda, * )A, integerLDA,
       complex*16, dimension( * )TAU, complex*16, dimension( * )WORK, integerINFO)
       ZUNGL2 generates all or part of the unitary matrix Q from an LQ factorization determined
       by cgelqf (unblocked algorithm).

       Purpose:

	    ZUNGL2 generates an m-by-n complex 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 . . . H(2)**H H(1)**H

	    as returned by ZGELQF.

       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 COMPLEX*16 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 ZGELQF 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 COMPLEX*16 array, dimension (K)
		     TAU(i) must contain the scalar factor of the elementary
		     reflector H(i), as returned by ZGELQF.

	   WORK

		     WORK is COMPLEX*16 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:
	   September 2012

       Definition at line 114 of file zungl2.f.

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

Version 3.4.2				 Tue Sep 25 2012			      zungl2.f(3)
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 06:46 AM.