Stationary random subgroups in negative curvature
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We show that discrete stationary random subgroups of isometry groups of Gromov hyperbolic spaces have full limit sets as well as critical exponents bounded from below. This information is used to answer a question of Gelander and show that a rank one locally symmetric space for which the bottom of the spectrum of the Laplace-Beltrami operator is the same as that of its universal cover has unbounded injectivity radius.
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Forward citations
Cited by 2 Pith papers
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The No-Core Principle for Stationary Actions and Ends of Stationary Random Subgroups
Proves a regularity principle for stationary actions and applies it to classify the number of ends in Schreier graphs of stationary random subgroups almost surely, with topological counterexamples.
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Ends of stationary metric measure spaces
Stationary random metric measure spaces have 0, 1, 2 or Cantor ends, with surfaces classified by homeomorphism type.
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