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Abstract
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We consider nonelementary random walks on general hyperbolic spaces.
Without any moment condition on the walk, we show that it escapes linearly
to infinity, with exponential error bounds. We even get such exponential
bounds up to the escape rate of the walk. Our proof relies on an inductive
decomposition of the walk, recording times at which it could go to infinity
in several independent directions, and using these times to control further
backtracking.
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Keywords
large deviations, random walks, hyperbolic groups
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Mathematical Subject Classification
Primary: 20F67, 20P05, 60B15, 60F10
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Milestones
Received: 15 February 2021
Revised: 28 April 2022
Accepted: 1 June 2022
Published: 15 January 2023
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