clatzm-f(3)

clatzm.f –

Synopsis

Functions/Subroutines

subroutine clatzm (SIDE, M, N, V, INCV, TAU, C1, C2, LDC, WORK)
CLATZM

Function/Subroutine Documentation

subroutine clatzm (characterSIDE, integerM, integerN, complex, dimension( * )V, integerINCV, complexTAU, complex, dimension( ldc, * )C1, complex, dimension( ldc, * )C2, integerLDC, complex, dimension( * )WORK)

CLATZM

Purpose:

 This routine is deprecated and has been replaced by routine CUNMRZ.
 CLATZM applies a Householder matrix generated by CTZRQF 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 is INTEGER
 The number of rows of the matrix C.

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

 V is COMPLEX 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
 The value tau in the representation of P.

 C1 is COMPLEX 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 COMPLEX 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 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 clatzm.f.

Author

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