Assouad type dimensions of parabolic Julia sets

Autor: Fraser, Jonathan M., Stuart, Liam
Rok vydání: 2022
Předmět:
Druh dokumentu: Working Paper
Popis: We prove that the Assouad dimension of a parabolic Julia set is $\max\{1,h\}$ where $h$ is the Hausdorff dimension of the Julia set. Since $h$ may be strictly less than 1, this provides examples where the Assouad and Hausdorff dimension are distinct. The box and packing dimensions of the Julia set are known to coincide with $h$ and, moreover, $h$ can be characterised by a topological pressure function. This distinctive behaviour of the Assouad dimension invites further analysis of the Assouad type dimensions, including the Assouad and lower spectra. We compute all of the Assouad type dimensions for parabolic Julia sets and the associated $h$-conformal measure. Further, we show that if a Julia set has a Cremer point, then the Assouad dimension is 2.
Comment: 26 pages, 1 figure. This paper used to form part of arXiv:2007.15493 which has subsequently been cut into three pieces. This version contains a new result on Julia sets with Cremer points
Databáze: arXiv