Geometric renormalisation and Hausdorff dimension for loop-approximable geodesics escaping to infinity

Abstract

The main result of this paper is to show that if $\H$ is a normal subgroup of a Kleinian group $G$ such that $G/\H$ contains a coset which is represented by some loxodromic element, then the Hausdorff dimension of the transient limit set of $\H$ coincides with the Hausdorff dimension of the limit set of $G$. This observation extends previous results by Fern\'andez and Meli\'an for Riemann surfaces.