zlatzm3
Part of zlatzm.f(3).
Usage
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 This routine is deprecated and has been replaced by routine ZUNMRZ.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.
Definition at line 151 of file zlatzm.f.
Releases
10 releases since Debian 1.3 (Bo); the text changed 7 times.