SRC/DEPRECATED/slatzm.f(3) Library Functions Manual SRC/DEPRECATED/slatzm.f(3)

SRC/DEPRECATED/slatzm.f


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

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 This routine is deprecated and has been replaced by routine SORMRZ.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

Generated automatically by Doxygen for LAPACK from the source code.

Version 3.12.0 LAPACK