H
¥
Filtering Solution
•
There exists a causal filter
F(s)
Î
RH
¥
such that
J<
g
2
if and
only if
J
¥
Î
dom(Ric)
and
Y
¥
=
Ric
(
J
¥
)
³
0
•
•
•
where
Y
¥
is the stabilizing solution to
•
•
w