The near-parabolic geometry of external rays

Fuente: arXiv
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Main Author: Kapiamba, Alex
Format: Preprint
Published: 2024
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author Kapiamba, Alex
author_facet Kapiamba, Alex
contents Using Lavaurs maps and near-parabolic renormalization, we describe the degenerating geometry of external rays for quadratic polynomials when a periodic cycle becomes parabolic. We similarly describe the geometry of parameter rays for the Mandelbrot set near parabolic points. Using this geometric control we establish new bounds on the size of limbs of the Mandelbrot set, for example providing a quadratic Pommerenke-Levin-Yoccoz inequality in the near-parabolic setting.
format Preprint
id arxiv_https___arxiv_org_abs_2401_00795
institution arXiv
publishDate 2024
record_format arxiv
spellingShingle The near-parabolic geometry of external rays
Kapiamba, Alex
Dynamical Systems
Using Lavaurs maps and near-parabolic renormalization, we describe the degenerating geometry of external rays for quadratic polynomials when a periodic cycle becomes parabolic. We similarly describe the geometry of parameter rays for the Mandelbrot set near parabolic points. Using this geometric control we establish new bounds on the size of limbs of the Mandelbrot set, for example providing a quadratic Pommerenke-Levin-Yoccoz inequality in the near-parabolic setting.
title The near-parabolic geometry of external rays
topic Dynamical Systems
url https://arxiv.org/abs/2401.00795