2020
DOI: 10.1017/etds.2020.98
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Spread out random walks on homogeneous spaces

Abstract: A measure on a locally compact group is said to be spread out if one of its convolution powers is not singular with respect to Haar measure. Using Markov chain theory, we conduct a detailed analysis of random walks on homogeneous spaces with spread out increment distribution. For finite volume spaces, we arrive at a complete picture of the asymptotics of the n-step distributions: they equidistribute towards Haar measure, often exponentially fast and locally uniformly in the starting position. In addition, many… Show more

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Cited by 4 publications
(4 citation statements)
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“…Their approach was recently refined and generalized to some nilmanifolds in the works [45, 46, 47] of He–de Saxcé and He–Lakrec–Lindenstrauss. Outside the realm of nilmanifolds, quantitative results on the convergence of include the work of Buenger [21, §3] and Khalil–Luethi [53], who consider some classes of measures supported on compact-by-solvable groups, and work of the first-named author [78] on spread-out measures.…”
Section: Recurrence Equidistribution Topology Of Homogeneous Measuresmentioning
confidence: 99%
“…Their approach was recently refined and generalized to some nilmanifolds in the works [45, 46, 47] of He–de Saxcé and He–Lakrec–Lindenstrauss. Outside the realm of nilmanifolds, quantitative results on the convergence of include the work of Buenger [21, §3] and Khalil–Luethi [53], who consider some classes of measures supported on compact-by-solvable groups, and work of the first-named author [78] on spread-out measures.…”
Section: Recurrence Equidistribution Topology Of Homogeneous Measuresmentioning
confidence: 99%
“…Their approach was recently refined and generalized to some nilmanifolds in the works [42,43,44] of He-de Saxcé and He-Lakrec-Lindenstrauss. Outside the realm of nilmanifolds, quantitative results on the convergence of µ * n * δ x include the work of Buenger [18, §3] and Khalil-Luethi [50], who consider some classes of measures supported on compact-by-solvable groups, and work of the first-named author [74] on spread-out measures.…”
Section: Recurrence Equidistribution Topology Of Homogeneous Measuresmentioning
confidence: 99%
“…Note however that we could not use existing concepts, since they are only well-defined for so-called "ψ-irreducible" chains, which our random walks are generally not. We refer to Meyn-Tweedie [11] for further reading on general state space Markov chains, and to [12] for a treatment of random walks with "spread out" increment distribution µ, which are ψ-irreducible.…”
Section: Periodicitymentioning
confidence: 99%
“…Answers are available only in special cases: Breuillard [7] established (1.2) for certain measures µ supported on unipotent subgroups, Buenger [8] proved it for some sparse solvable measures, and in previous work the author dealt with the case of spread out measures [12].…”
Section: Introductionmentioning
confidence: 99%