Busemann functions and uniformization of Gromov hyperbolic spaces
Abstract
Uniformization theory of Gromov hypebolic spaces investigated by Bonk, Heinonen and Koskela, generalizes the case where a classical Poincar\'e ball type model is used as the starting point. In this paper, we develop this approach in the case where the underlying domain is unbounded, corresponding to the classical Poincar\'e half-space model. More precisely, we study conformal densities via Busemann functions on Gromov hyperbolic spaces and prove that the deformed spaces are unbounded uniform spaces. Furthermore, we show that there is a one-to-one correspondence between the bilipschitz classes of proper geodesic Gromov hyperbolic spaces that are roughly starlike with respect to a point on Gromov boundary and the quasisimilarity classes of unbounded locally compact uniform spaces. Our result can be understood as an unbounded counterpart of the main result of Bonk, Heinonen, and Koskela in "Uniformizing Gromov Hyperbolic Spaces", Ast\'erisque 270 (2001).
Keywords
Cite
@article{arxiv.2008.01399,
title = {Busemann functions and uniformization of Gromov hyperbolic spaces},
author = {Qingshan Zhou and Saminathan Ponnusamy and Antti Rasila},
journal= {arXiv preprint arXiv:2008.01399},
year = {2023}
}
Comments
27 pages; The article is under review with a journal. The present version is a revised and reformulated version of the earlier version