SRC/dlarfx.f(3)            Library Functions Manual            SRC/dlarfx.f(3)

NAME
       SRC/dlarfx.f

SYNOPSIS
   Functions/Subroutines
       subroutine dlarfx (side, m, n, v, tau, c, ldc, work)
           DLARFX applies an elementary reflector to a general rectangular
           matrix, with loop unrolling when the reflector has order <= 10.

Function/Subroutine Documentation
   subroutine dlarfx (character side, integer m, integer n, double precision,
       dimension( * ) v, double precision tau, double precision, dimension(
       ldc, * ) c, integer ldc, double precision, dimension( * ) work)
       DLARFX applies an elementary reflector to a general rectangular matrix,
       with loop unrolling when the reflector has order <= 10.

       Purpose:


            DLARFX applies a real elementary reflector H to a real m by n
            matrix C, from either the left or the right. H is represented in the
            form

                  H = I - tau * v * v**T

            where tau is a real scalar and v is a real vector.

            If tau = 0, then H is taken to be the unit matrix

            This version uses inline code if H has order < 11.

       Parameters
           SIDE

                     SIDE is CHARACTER*1
                     = 'L': form  H * C
                     = 'R': form  C * H

           M

                     M is INTEGER
                     The number of rows of the matrix C.

           N

                     N is INTEGER
                     The number of columns of the matrix C.

           V

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

           TAU

                     TAU is DOUBLE PRECISION
                     The value tau in the representation of H.

           C

                     C is DOUBLE PRECISION 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

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

           WORK

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

       Author
           Univ. of Tennessee

           Univ. of California Berkeley

           Univ. of Colorado Denver

           NAG Ltd.

       Definition at line 119 of file dlarfx.f.

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

LAPACK                          Version 3.12.0                 SRC/dlarfx.f(3)