

This was certainly surprising to us when we discovered it.
Does it surprise you?
It is remarkable that it is true for any discrete dynamical
system.
Drs. Banks,
Brooks,
Cairns,
Davis and Stacey.
It meant that the one of the most popular definitions of chaos, the one suggested by Professor Bob Devaney of Boston University became simpler, easier to apply in practice and better understood by mathematicians.