SRC/DEPRECATED/zlatzm.f(3) Library Functions Manual SRC/DEPRECATED/zlatzm.f(3)

SRC/DEPRECATED/zlatzm.f


subroutine zlatzm (side, m, n, v, incv, tau, c1, c2, ldc, work)
ZLATZM

ZLATZM

Purpose:

 This routine is deprecated and has been replaced by routine ZUNMRZ.
 ZLATZM applies a Householder matrix generated by ZTZRQF to a matrix.
 Let P = I - tau*u*u**H,   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 COMPLEX*16 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 COMPLEX*16
          The value tau in the representation of P.

C1

          C1 is COMPLEX*16 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 COMPLEX*16 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 >= max(1,M).

WORK

          WORK is COMPLEX*16 array, dimension
                      (N) if SIDE = 'L'
                      (M) if SIDE = 'R'

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 151 of file zlatzm.f.

Generated automatically by Doxygen for LAPACK from the source code.

Version 3.12.0 LAPACK