It is best not to use ......
The best one could hope for is $K\ge F$.
This result is best possible. [Or: the best possible]
In Theorem 2 we show that the bound is not far from best possible.
The above bound on $a_n$ is close to best possible.
The best known of these is the Knaster continuum.
It can be inferred from known results that these series at best converge conditionally in $L^p$.
Go to the list of words starting with: a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
y
z