Seminari del Dipartimento di Matematica

Seminario del 2020

Anna Miriam Benini (Università di Parma)

Infinite entropy for transcendental entire functions

nell'ambito della serie: DINAMICI: ANOTHER INTERNET SEMINAR

sistemi dinamici

Defining entropy on noncompact metric spaces is a tricky business, since there are several natural and nonequivalent generalizations of the usual notions of entropy for continuous maps on compact spaces. By defining entropy for transcendental maps on the complex plane as the sup over the entropy restricted to compact forward invariant subsets, we prove that with this definition the entropy of such functions is infinite. The proof relies on covering results which are distinctive to holomorphic maps.