English

On totally hyperbolic non-Fuchsian type-preserving representations

Geometric Topology 2025-11-19 v1

Abstract

We identify type-preserving representations ϕ:π1(Σ)PSL(2,R)\phi: \pi_1(\Sigma)\to \mathrm{PSL}(2,\mathbb{R}) of the fundamental group of every punctured surface Σ=Σg,p\Sigma = \Sigma_{g,p} that are not Fuchsian yet send all non-peripheral simple closed curves to hyperbolic elements, which give a negative answer to a question of Bowditch. These representations have relative Euler class e(ϕ)=±(χ(Σ)+1)e(\phi) = \pm (\chi(\Sigma) + 1), and their PSL(2,R)\mathrm{PSL}(2,\mathbb{R})-conjugacy classes form a full-measure subset of 2p2p connected components of the relative character variety. We further show that, while these representations are not Fuchsian, their restrictions to certain subsurfaces of Σ\Sigma are Fuchsian.

Keywords

Cite

@article{arxiv.2511.13989,
  title  = {On totally hyperbolic non-Fuchsian type-preserving representations},
  author = {Inyoung Ryu},
  journal= {arXiv preprint arXiv:2511.13989},
  year   = {2025}
}

Comments

19 pages, 4 figures. Comments are welcome!

R2 v1 2026-07-01T07:42:23.728Z