ZLATZM - Online Linux Manual Page

Section : 1
Updated : November 2008
Source : LAPACK routine (version 3.2)
Note : LAPACK routine (version 3.2)
NAMEZLATZM - routine i deprecated and has been replaced by routine ZUNMRZ
SYNOPSISSUBROUTINE ZLATZM(  SIDE, M, N, V, INCV, TAU, C1, C2, LDC, WORK )  CHARACTER SIDE  INTEGER INCV, LDC, M, N  COMPLEX*16 TAU  COMPLEX*16 C1( LDC, * ), C2( LDC, * ), V( * ), WORK( * )
PURPOSEThis routine is deprecated and has been replaced by routine ZUNMRZ.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', 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.
ARGUMENTSSIDE (input) CHARACTER*1  = 'L': form P * C
= 'R': form C * P M (input) INTEGER  The number of rows of the matrix C. N (input) INTEGER  The number of columns of the matrix C. V (input) 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 (input) INTEGER  The increment between elements of v. INCV <> 0 TAU (input) COMPLEX*16  The value tau in the representation of P. C1 (input/output) 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 (input/output) 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 (input) INTEGER  The leading dimension of the arrays C1 and C2. LDC >= max(1,M). WORK (workspace) COMPLEX*16 array, dimension  (N) if SIDE = 'L' (M) if SIDE = 'R' 0
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