Markov maps and quasi-conformal deformations associated to geometrically finite Kleinian groups

Abstract

It is known that the dynamical properties of Kleinian groups with parabolic elements are much more complex than those without parabolic elements. In this paper, we mainly study the quasi-conformal deformation properties of geometrically finite Kleinian groups with parabolic elements. We show that, for a Kleinian group $G$ with parabolic elements, there exists a subset $K$ of the limit set $Λ(G)$ such that the first return map $f_{K}$ is (eventually) expending. Furthermore, the expending property is invariant under quasiconformal deformations. As an application, we show that the geometrically finite Kleinian groups have Ruelle's property. Finally, we use eigenvalue algorithm to calculate the precise Hausdorff dimensions of Hecke groups, which serves as an example to support our results.