English

Complex Fenchel-Nielsen coordinates with small imaginary parts

Geometric Topology 2012-04-27 v1

Abstract

Kahn and Markovic \cite{KahnMark} proved that the fundamental group of each closed hyperbolic three manifold contains a closed surface subgroup. One of the main ingredients in their proof is a theorem which states that an assignment of nearly real, complex Fenchel-Nielsen coordinates to the cuffs of a pants decomposition of a closed surface SS induces a quasiFuchsian representation of the fundamental group of SS. We give a new proof of this theorem with a slightly stronger conditions on the Fenchel-Nielsen coordinates and explain how to use the exponential mixing of the geodesic flow on a closed hyperbolic three manifold to prove that our theorem is sufficient for the applications in the work of Kahn and Markovic \cite{KahnMark}.

Keywords

Cite

@article{arxiv.1204.5778,
  title  = {Complex Fenchel-Nielsen coordinates with small imaginary parts},
  author = {Dragomir Šarić},
  journal= {arXiv preprint arXiv:1204.5778},
  year   = {2012}
}

Comments

25 pages, 6 figures

R2 v1 2026-06-21T20:54:50.332Z