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Article Dans Une Revue Tunisian Journal of Mathematics Année : 2022

Exponential bounds for random walks on hyperbolic spaces without moment conditions

Résumé

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 rate of escape 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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Dates et versions

hal-03127019 , version 1 (01-02-2021)

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Sébastien Gouëzel. Exponential bounds for random walks on hyperbolic spaces without moment conditions. Tunisian Journal of Mathematics, 2022, 4 (4), pp.635-671. ⟨10.2140/tunis.2022.4.635⟩. ⟨hal-03127019⟩
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