Scroll to navigation

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

NAME

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

SYNOPSIS

Functions/Subroutines


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

Function/Subroutine Documentation

subroutine SLATZM (character side, integer m, integer n, real, dimension( * ) v, integer incv, real tau, real, dimension( ldc, * ) c1, real, dimension( ldc, * ) c2, integer ldc, real, dimension( * ) work)

SLATZM

Purpose:

!>
!> This routine is deprecated and has been replaced by routine SORMRZ.
!>
!> SLATZM applies a Householder matrix generated by STZRQF 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 REAL 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 REAL
!>          The value tau in the representation of P.
!> 

C1

!>          C1 is REAL 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 REAL 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 REAL 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 slatzm.f.

Author

Generated automatically by Doxygen for LAPACK from the source code.

Version 3.12.0 LAPACK