Arithmetic topological models for the attractors of infinitely satellite renormalisable maps
File(s)
Author(s)
Pedramfar, Mohammad
Type
Thesis
Abstract
In this thesis we propose an arithmetic topological model for the post-critical set of infinitely quadratic-like renormalisable quadratic polynomials of satellite type. This is inspired by the near-parabolic renormalisation scheme of Inou and Shishikura. This model only depends on the combinatorics of the renormalisations, which is a sequence of rational numbers in (-1/2, 1/2]\{0}. We also introduce an optimal arithmetic condition on such sequences that determines when the model is a Cantor set. We show that these topological models enjoy a universal property. That is, either they are a Cantor set of points or they are determined by some topological axioms similar to the topological characterisation of the Cantor set in the plane. We introduce a new topological object, hairy Cantor sets, and investigate their topological properties. We also define a model for the dynamics on the topological model, designed to reflect the behaviour of the quadratic map on its post-critical set. We identify all closed invariant subsets and describe their topology. We also show that the model is uniquely ergodic, and identify the unique invariant probability.
Version
Open Access
Date Issued
2020-01
Date Awarded
2020-06
Copyright Statement
Creative Commons Attribution NonCommercial NoDerivatives Licence
Advisor
Cheraghi, Davoud
Sponsor
European Research Council advanced grant
Grant Number
339523
Publisher Department
Mathematics
Publisher Institution
Imperial College London
Qualification Level
Doctoral
Qualification Name
Doctor of Philosophy (PhD)