Robust Performance
q
Let
q
q
q
q
q
Theorem:
Let
b
>0
. For all
D
(s)
Î
D
with ||
D
||
¥
<
1/
b
, the
system is well-posed, internally
stable, and
||
F
u
(
G
p
,
D
)
||
¥
£
b
if
and only if
q