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slatzm.f(3) LAPACK slatzm.f(3)

NAME

slatzm.f -

SYNOPSIS

Functions/Subroutines


subroutine slatzm (SIDE, M, N, V, INCV, TAU, C1, C2, LDC, WORK)
 
SLATZM

Function/Subroutine Documentation

subroutine slatzm (characterSIDE, integerM, integerN, real, dimension( * )V, integerINCV, realTAU, real, dimension( ldc, * )C1, real, dimension( ldc, * )C2, integerLDC, 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 This routine is deprecated and has been replaced by routine SORMRZ.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.
Date:
November 2011
Definition at line 152 of file slatzm.f.

Author

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