SRC/clarf.f(3)

NAME
SRC/clarf.f

SYNOPSIS

  Functions/Subroutines
subroutine clarf (side, m, n, v, incv, tau, c, ldc, work)
CLARF applies an elementary reflector to a general rectangular matrix.

Function/Subroutine Documentation

  subroutine clarf (character side, integer m, integer n, complex, dimension( * ) v, integer incv, complex tau, complex, dimension( ldc, * ) c, integer ldc, complex, dimension( * ) work)

CLARF applies an elementary reflector to a general rectangular matrix.

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**H
     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**H (the conjugate transpose of H), supply conjg(tau) instead
     tau.

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 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

              INCV is INTEGER
              The increment between elements of v. INCV <> 0.

    TAU

              TAU is COMPLEX
              The value tau in the representation of H.

    C

              C is 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

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

    WORK

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

Author
    Univ. of Tennessee

    Univ. of California Berkeley

    Univ. of Colorado Denver

    NAG Ltd.

Definition at line 127 of file clarf.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.