clarf(3F)

NAME
     CLARF - applie a complex elementary reflector H to a complex M-by-N
     matrix C, from either the left or the right

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

         CHARACTER     SIDE

         INTEGER       INCV, LDC, M, N

         COMPLEX       TAU

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

PURPOSE
     CLARF 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.

     To apply H' (the conjugate transpose of H), supply conjg(tau) instead
     tau.


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
             (1 + (M-1)*abs(INCV)) if SIDE = 'L' or (1 + (N-1)*abs(INCV)) if
             SIDE = 'R' The vector v in the representation of H. V is not used
             if TAU = 0.

     INCV    (input) INTEGER
             The increment between elements of v. INCV <> 0.

     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. LDC >= max(1,M).

     WORK    (workspace) COMPLEX array, dimension
             (N) if SIDE = 'L' or (M) if SIDE = 'R'