English

Positive area and inaccessible fixed points for hedgehogs

Complex Variables 2019-02-20 v4 Dynamical Systems

Abstract

Let f be a germ of holomorphic diffeomorphism with an irra- tionally indifferent fixed point at the origin in C (i.e. f(0) = 0, f'(0) = e 2pi i alpha, alpha in R - Q). Perez-Marco showed the existence of a unique family of nontrivial invariant full continua containing the fixed point called Siegel compacta. When f is non-linearizable (i.e. not holomorphically conjugate to the rigid rotation R_{alpha}(z) = e 2pi i z) the invariant compacts obtained are called hedgehogs. Perez-Marco developed techniques for the construction of examples of non-linearizable germs; these were used by the author to construct hedge- hogs of Hausdorff dimension one, and adapted by Cheritat to construct Siegel disks with pseudo-circle boundaries. We use these techniques to construct hedgehogs of positive area and hedgehogs with inaccessible fixed points.

Keywords

Cite

@article{arxiv.1010.4496,
  title  = {Positive area and inaccessible fixed points for hedgehogs},
  author = {Kingshook Biswas},
  journal= {arXiv preprint arXiv:1010.4496},
  year   = {2019}
}

Comments

Typos and part of proof rewritten

R2 v1 2026-06-21T16:32:16.884Z