Loosely speaking mixing means that points that are
initially close in phase space eventually disperse into
a homogeneous distribution throughout phase space.
In particular
(A)= 0
or (A)= 1, i.e mixing implies ergodicity.
Both invertible and non-invertible systems may be mixing.
Entropy is constant and determined by initial conditions. Related to independence.
Author Per Stoltze stoltze@fysik.dtu.dk