zlatzm.f man page

zlatzm.f —

Synopsis

Functions/Subroutines

subroutine zlatzm (SIDE, M, N, V, INCV, TAU, C1, C2, LDC, WORK)
ZLATZM

Function/Subroutine Documentation

subroutine zlatzm (character SIDE, integer M, integer N, complex*16, dimension( * ) V, integer INCV, complex*16 TAU, complex*16, dimension( ldc, * ) C1, complex*16, dimension( ldc, * ) C2, integer LDC, complex*16, dimension( * ) WORK)

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 This routine is deprecated and has been replaced by routine ZUNMRZ.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.

Date:

December 2016

Definition at line 154 of file zlatzm.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.

Referenced By

The man page zlatzm(3) is an alias of zlatzm.f(3).

Sat Jun 24 2017 Version 3.7.1 LAPACK