On Hausdorff dimension of polynomial not totally disconnected Julia sets

Authors :: Anna Zdunik
Feliks Przytycki
Publication Year :: 2020
Publisher :: arXiv, 2020.
Abstract: We prove that for every polynomial of one complex variable of degree at least 2 and Julia set not being totally disconnected nor a circle, nor interval, Hausdorff dimension of this Julia set is larger than 1. Till now this was known only in the connected Julia set case. We give also an example of a polynomial with non-connected but not totally disconnected Julia set and such that all its components comprising of more than single points are analytic arcs, thus resolving a question by Christopher Bishop, who asked whether every such component must have Hausdorff dimension larger than 1.<br />Comment: Abstract slightly reformulated