CLARFX man page on Scientific

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CLARFX(1)	    LAPACK auxiliary routine (version 3.2)	     CLARFX(1)

NAME
       CLARFX  -  applies a complex elementary reflector H to a complex m by n
       matrix C, from either the left or the right

SYNOPSIS
       SUBROUTINE CLARFX( SIDE, M, N, V, TAU, C, LDC, WORK )

	   IMPLICIT	  NONE

	   CHARACTER	  SIDE

	   INTEGER	  LDC, M, N

	   COMPLEX	  TAU

	   COMPLEX	  C( LDC, * ), V( * ), WORK( * )

PURPOSE
       CLARFX applies a complex elementary reflector H to a  complex  m	 by  n
       matrix  C,  from	 either the left or the right. H is represented in the
       form
	     H = I - tau * v * v'
       where tau is a complex scalar and v is a complex vector.
       If tau = 0, then H is taken to be the unit matrix
       This version uses inline code if H has order < 11.

ARGUMENTS
       SIDE    (input) CHARACTER*1
	       = 'L': form  H * C
	       = 'R': form  C * H

       M       (input) INTEGER
	       The number of rows of the matrix C.

       N       (input) INTEGER
	       The number of columns of the matrix C.

       V       (input) COMPLEX array, dimension (M) if SIDE = 'L'
	       or (N) if SIDE = 'R' The vector v in the representation of H.

       TAU     (input) COMPLEX
	       The value tau in the representation of H.

       C       (input/output) COMPLEX array, dimension (LDC,N)
	       On entry, the m by n matrix C.  On exit, C  is  overwritten  by
	       the matrix H * C if SIDE = 'L', or C * H if SIDE = 'R'.

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

       WORK    (workspace) COMPLEX array, dimension (N) if SIDE = 'L'
	       or  (M)	if  SIDE = 'R' WORK is not referenced if H has order <
	       11.

 LAPACK auxiliary routine (versioNovember 2008			     CLARFX(1)
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