rpl/lapack/lapack/dlarfgp.f - diff

Return to dlarfgp.f CVS log

Up to [local] / rpl / lapack / lapack

version 1.4, 2010/12/21 13:53:31	version 1.5, 2011/07/22 07:38:07
Line 1	Line 1
SUBROUTINE DLARFGP( N, ALPHA, X, INCX, TAU )	SUBROUTINE DLARFGP( N, ALPHA, X, INCX, TAU )
*	*
* -- LAPACK auxiliary routine (version 3.2.2) --	* -- LAPACK auxiliary routine (version 3.3.1) --
* -- LAPACK is a software package provided by Univ. of Tennessee, --	* -- LAPACK is a software package provided by Univ. of Tennessee, --
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--	* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
* June 2010	* -- April 2011 --
*	*
* .. Scalar Arguments ..	* .. Scalar Arguments ..
INTEGER INCX, N	INTEGER INCX, N
Line 19	Line 19
* DLARFGP generates a real elementary reflector H of order n, such	* DLARFGP generates a real elementary reflector H of order n, such
* that	* that
*	*
* H * ( alpha ) = ( beta ), H' * H = I.	* H * ( alpha ) = ( beta ), H*T H = I.
* ( x ) ( 0 )	* ( x ) ( 0 )
*	*
* where alpha and beta are scalars, beta is non-negative, and x is	* where alpha and beta are scalars, beta is non-negative, and x is
* an (n-1)-element real vector. H is represented in the form	* an (n-1)-element real vector. H is represented in the form
*	*
* H = I - tau * ( 1 ) * ( 1 v' ) ,	* H = I - tau * ( 1 ) * ( 1 v**T ) ,
* ( v )	* ( v )
*	*
* where tau is a real scalar and v is a real (n-1)-element	* where tau is a real scalar and v is a real (n-1)-element