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zlatzm.f(3) LAPACK zlatzm.f(3)

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 This routine is deprecated and has been replaced by routine ZUNMRZ.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.
Date:
November 2011
Definition at line 153 of file zlatzm.f.

Generated automatically by Doxygen for LAPACK from the source code.
Sat Nov 16 2013 Version 3.4.2

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