Lemma 4. Let rank C(1) = q
- r. Then
O
nI
r
√A
R.A R
Iqr
O
v
O
nI
r
( „.
R-A R
q r m q-r
nRrτA R
V r m q-r
, „ A
nR—A R
q r m r
n2RrτA R
r m r ^
and
(
lq-q
O
v
Rqτ,C(1)∑ X1XτC (1) R
R- 1
Rr-D (1) ∑ γ τχχ'(1) R
k-1
JLir
RτB R
Iqr
O
v
A
O
JLir
A
Rqτ-rc(1)∑ γ XY D (1) τR,
k =1
m
RrτD (1)∑ γ2 YkYkτD (1) τR
k= 1
(15)
( r- a a a
R-B R JLrLb R
q > m q-r q q ' m r
JnRrτB R nRτB R
V r m q-r r m r ^
RqTrC(1)Σ YkYkτC(1)-Rqr
m
RqτrC(1)У δ YZ τD-R
q r X /Z k k k r r
(16)
k=1 k=1
mm
R,τD. ∑ δ WX(1) τRrr RτD. ∑ δ 2ZZ τD.τRr
V k-1 k-1 ^
where the random vectors Xi, Yj and Z are the same as in Lemmas 1-2. Moreover,
R ,.'W'R
m
n2
D (O
→
o a
V
r, m
√
(17)
where
m
= R,τD (1)∑ γ 2 YtYτD (1) τRr
k= 1
(
- RrτD(1)∑ γkYkXkτC(1)τRt
(
m
Rqτ-rC (1)∑ XkXk-C (1) τRl
∖
Y√
k= 1
q-r
√
k= 1
q-r
√
, JL , _
R,-C(1)∑ γ„xRd(1)τR,..
k =1
10