Unix/Linux Go Back    


CentOS 7.0 - man page for zunml2 (centos section 3)

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


zunml2.f(3)				      LAPACK				      zunml2.f(3)

NAME
       zunml2.f -

SYNOPSIS
   Functions/Subroutines
       subroutine zunml2 (SIDE, TRANS, M, N, K, A, LDA, TAU, C, LDC, WORK, INFO)
	   ZUNML2 multiplies a general matrix by the unitary matrix from a LQ factorization
	   determined by cgelqf (unblocked algorithm).

Function/Subroutine Documentation
   subroutine zunml2 (characterSIDE, characterTRANS, integerM, integerN, integerK, complex*16,
       dimension( lda, * )A, integerLDA, complex*16, dimension( * )TAU, complex*16, dimension(
       ldc, * )C, integerLDC, complex*16, dimension( * )WORK, integerINFO)
       ZUNML2 multiplies a general matrix by the unitary matrix from a LQ factorization
       determined by cgelqf (unblocked algorithm).

       Purpose:

	    ZUNML2 overwrites the general complex m-by-n matrix C with

		  Q * C  if SIDE = 'L' and TRANS = 'N', or

		  Q**H* C  if SIDE = 'L' and TRANS = 'C', or

		  C * Q  if SIDE = 'R' and TRANS = 'N', or

		  C * Q**H if SIDE = 'R' and TRANS = 'C',

	    where Q is a complex unitary matrix defined as the product of k
	    elementary reflectors

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

	    as returned by ZGELQF. Q is of order m if SIDE = 'L' and of order n
	    if SIDE = 'R'.

       Parameters:
	   SIDE

		     SIDE is CHARACTER*1
		     = 'L': apply Q or Q**H from the Left
		     = 'R': apply Q or Q**H from the Right

	   TRANS

		     TRANS is CHARACTER*1
		     = 'N': apply Q  (No transpose)
		     = 'C': apply Q**H (Conjugate transpose)

	   M

		     M is INTEGER
		     The number of rows of the matrix C. M >= 0.

	   N

		     N is INTEGER
		     The number of columns of the matrix C. N >= 0.

	   K

		     K is INTEGER
		     The number of elementary reflectors whose product defines
		     the matrix Q.
		     If SIDE = 'L', M >= K >= 0;
		     if SIDE = 'R', N >= K >= 0.

	   A

		     A is COMPLEX*16 array, dimension
					  (LDA,M) if SIDE = 'L',
					  (LDA,N) if SIDE = 'R'
		     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.
		     A is modified by the routine but restored on exit.

	   LDA

		     LDA is INTEGER
		     The leading dimension of the array A. LDA >= max(1,K).

	   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.

	   C

		     C is COMPLEX*16 array, dimension (LDC,N)
		     On entry, the m-by-n matrix C.
		     On exit, C is overwritten by Q*C or Q**H*C or C*Q**H or C*Q.

	   LDC

		     LDC is INTEGER
		     The leading dimension of the array C. LDC >= max(1,M).

	   WORK

		     WORK is COMPLEX*16 array, dimension
					      (N) if SIDE = 'L',
					      (M) if SIDE = 'R'

	   INFO

		     INFO is INTEGER
		     = 0: successful exit
		     < 0: if INFO = -i, the i-th argument had an illegal value

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 159 of file zunml2.f.

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

Version 3.4.2				 Tue Sep 25 2012			      zunml2.f(3)
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 08:55 PM.