That (2) implies (1) is the content of Corollary 3.
The notion of turbulence almost exactly captures the combinatorial content of not being an $S$-action.
The author thanks John Fox for helpful comments on the content and presentation of this paper.
Intuitively, entropy of a partition is a measure of its information content—the larger the entropy, the larger the information content.
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