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Central limit theorems for counting measures in coarse negative curvature

Published online by Cambridge University Press:  03 November 2022

Ilya Gekhtman
Faculty of Mathematics, Technion-Israel Institute of Technology, Haifa 3200003,
Samuel J. Taylor
Department of Mathematics, Temple University, 1805 North Broad Street, Philadelphia, PA 19122, USA
Giulio Tiozzo
Department of Mathematics, University of Toronto, 40 St George St, Toronto, ON M5S 2E4, Canada


We establish central limit theorems for an action of a group $G$ on a hyperbolic space $X$ with respect to the counting measure on a Cayley graph of $G$. Our techniques allow us to remove the usual assumptions of properness and smoothness of the space, or cocompactness of the action. We provide several applications which require our general framework, including to lengths of geodesics in geometrically finite manifolds and to intersection numbers with submanifolds.

Research Article
© 2022 The Author(s). The publishing rights in this article are licensed to Foundation Compositio Mathematica under an exclusive licence

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Gekhtman is partially supported by NSERC. Taylor is partially supported by NSF grants DMS-1744551, DMS-2102018 and the Sloan Foundation. Tiozzo is partially supported by NSERC, an Ontario Early Researcher Award and the Sloan Foundation.


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