1. Manuals
  2. Tumbleweed
  3. lapack-man
  4. dlatzm.f(3)

Scroll to navigation

/home/abuild/rpmbuild/BUILD/lapack-3.12.0/SRC/DEPRECATED/dlatzm.f(3) Library Functions Manual /home/abuild/rpmbuild/BUILD/lapack-3.12.0/SRC/DEPRECATED/dlatzm.f(3)

NAME

/home/abuild/rpmbuild/BUILD/lapack-3.12.0/SRC/DEPRECATED/dlatzm.f

SYNOPSIS

Functions/Subroutines


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

Function/Subroutine Documentation

subroutine DLATZM (character side, integer m, integer n, double precision, dimension( * ) v, integer incv, double precision tau, double precision, dimension( ldc, * ) c1, double precision, dimension( ldc, * ) c2, integer ldc, 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 This routine is deprecated and has been replaced by routine DORMRZ.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.

Definition at line 150 of file dlatzm.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.

Version 3.12.0 LAPACK