# Mathematical Sciences Research Institute

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# Seminar

Member Seminar: Equidistribution and counting for group actions on trees November 01, 2016 (11:00 AM PDT - 12:00 PM PDT)
Parent Program: Geometric Group Theory MSRI: Simons Auditorium
Speaker(s) Frédéric Paulin (Université de Paris XI)
Description No Description
Video
Given a discrete group $\Gamma$ of automorphisms of a uniform tree $T$, we will give counting and equidistribution results of common perpendiculars between two locally finite orbits of subtrees of $T$ when their lengths tend to $\infty$. Applications will be given to equidistribution results of rational and quadratic irrational elements in local fields of positive characteristic. This is joint work with A.~Broise and J.~Parkkonen.