English

Finite and infinite degree Thurston maps with extra marked points

Dynamical Systems 2024-10-10 v1

Abstract

We investigate the family of marked Thurston maps that are defined everywhere on the topological sphere S2S^2, potentially excluding at most countable closed set of essential singularities. We show that when an unmarked Thurston map ff is realized by a postsingularly finite holomorphic map, the marked Thurston map (f,A)(f, A), where AS2A \subset S^2 is the corresponding finite marked set, admits such a realization if and only if it has no degenerate Levy cycle. To obtain this result, we analyze the associated pullback map σf,A\sigma_{f, A} defined on the Teichm\"uller space TA\mathcal{T}_A and demonstrate that some of its iterates admit well-behaved invariant complex sub-manifolds within TA\mathcal{T}_A. By applying powerful machinery of one-dimensional complex dynamics and hyperbolic geometry, we gain a clear understanding of the behavior of the map σf,A\sigma_{f, A} restricted to the corresponding invariant subset of the Teichm\"uller space TA\mathcal{T}_A.

Keywords

Cite

@article{arxiv.2410.06206,
  title  = {Finite and infinite degree Thurston maps with extra marked points},
  author = {Nikolai Prochorov},
  journal= {arXiv preprint arXiv:2410.06206},
  year   = {2024}
}

Comments

33 pages, 4 figures. arXiv admin note: text overlap with arXiv:2410.01146

R2 v1 2026-06-28T19:13:17.352Z