👤
Home Man
Search
Today's Posts
Register

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:
Select Section of Man Page:
Select Man Page Repository:

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

clarfg.f(3)				      LAPACK				      clarfg.f(3)

NAME
       clarfg.f -

SYNOPSIS
   Functions/Subroutines
       subroutine clarfg (N, ALPHA, X, INCX, TAU)
	   CLARFG generates an elementary reflector (Householder matrix).

Function/Subroutine Documentation
   subroutine clarfg (integerN, complexALPHA, complex, dimension( * )X, integerINCX, complexTAU)
       CLARFG generates an elementary reflector (Householder matrix).

       Purpose:

	    CLARFG generates a complex elementary reflector H of order n, such
	    that

		  H**H * ( alpha ) = ( beta ),	 H**H * H = I.
			 (   x	 )   (	 0  )

	    where alpha and beta are scalars, with beta real, and x is an
	    (n-1)-element complex vector. H is represented in the form

		  H = I - tau * ( 1 ) * ( 1 v**H ) ,
				( v )

	    where tau is a complex scalar and v is a complex (n-1)-element
	    vector. Note that H is not hermitian.

	    If the elements of x are all zero and alpha is real, then tau = 0
	    and H is taken to be the unit matrix.

	    Otherwise  1 <= real(tau) <= 2  and  abs(tau-1) <= 1 .

       Parameters:
	   N

		     N is INTEGER
		     The order of the elementary reflector.

	   ALPHA

		     ALPHA is COMPLEX
		     On entry, the value alpha.
		     On exit, it is overwritten with the value beta.

	   X

		     X is COMPLEX array, dimension
				    (1+(N-2)*abs(INCX))
		     On entry, the vector x.
		     On exit, it is overwritten with the vector v.

	   INCX

		     INCX is INTEGER
		     The increment between elements of X. INCX > 0.

	   TAU

		     TAU is COMPLEX
		     The value tau.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   September 2012

       Definition at line 107 of file clarfg.f.

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

Version 3.4.2				 Tue Sep 25 2012			      clarfg.f(3)


All times are GMT -4. The time now is 06:58 AM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.
×
UNIX.COM Login
Username:
Password:  
Show Password