dlatzm.f(3)

NAME
dlatzm.f -

SYNOPSIS

  Functions/Subroutines
subroutine DLATZM (SIDE, M, N, V, INCV, TAU, C1, C2, LDC, WORK)
DLATZM

Function/Subroutine Documentation

  subroutine DLATZM (CHARACTERSIDE, INTEGERM, INTEGERN, DOUBLE PRECISION, dimension( * )V, INTEGERINCV, DOUBLE PRECISIONTAU, DOUBLE PRECISION, dimension( ldc, * )C1, DOUBLE PRECISION, dimension( ldc, * )C2, INTEGERLDC, DOUBLE PRECISION, dimension( * )WORK)

DLATZM

Purpose:

     This routine is deprecated and has been replaced by routine DORMRZ.
     DLATZM applies a Householder matrix generated by DTZRQF to a matrix.
     Let P = I - tau*u*u**T,   u = ( 1 ),
                                   ( v )
     where v is an (m-1) vector if SIDE = 'L', or a (n-1) vector if
     SIDE = 'R'.
     If SIDE equals 'L', let
            C = [ C1 ] 1
                [ C2 ] m-1
                  n
     Then C is overwritten by P*C.
     If SIDE equals 'R', let
            C = [ C1, C2 ] m
                   1  n-1
     Then C is overwritten by C*P.

Parameters:
    SIDE

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

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

    INCV

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

    TAU

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

    C1

              C1 is DOUBLE PRECISION array, dimension
                             (LDC,N) if SIDE = 'L'
                             (M,1)   if SIDE = 'R'
              On entry, the n-vector C1 if SIDE = 'L', or the m-vector C1
              if SIDE = 'R'.
              On exit, the first row of P*C if SIDE = 'L', or the first
              column of C*P if SIDE = 'R'.

    C2

              C2 is DOUBLE PRECISION array, dimension
                             (LDC, N)   if SIDE = 'L'
                             (LDC, N-1) if SIDE = 'R'
              On entry, the (m - 1) x n matrix C2 if SIDE = 'L', or the
              m x (n - 1) matrix C2 if SIDE = 'R'.
              On exit, rows 2:m of P*C if SIDE = 'L', or columns 2:m of C*P
              if SIDE = 'R'.

    LDC

              LDC is INTEGER
              The leading dimension of the arrays C1 and C2. LDC >= (1,M).

    WORK

              WORK is DOUBLE PRECISION array, dimension
                          (N) if SIDE = 'L'
                          (M) if SIDE = 'R'

Author:
    Univ'. of Tennessee

    Univ'. of California Berkeley

    Univ'. of Colorado Denver

    NAG Ltd'.

Date:
    November 2011

Definition at line 152 of file dlatzm.f'.

Author

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