SLATZM (3) Linux Manual Page

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This routine is deprecated and has been replaced by routine SORMRZ.SLATZM applies a Householder matrix generated by STZRQF to a matrix.Let P = I - tau * u * u * *T, u = (1),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 is INTEGER
          The number of rows of the matrix C.

          N is INTEGER
          The number of columns of the matrix C.

          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 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 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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