Talks

Upcoming Talks

McGill Geometric Group Theory Seminar (November 5, 2025)

Recent Talks

Yale University Geometry and Topology Seminar (April 15, 2025)
New York Group Theory Seminar (March 21, 2025)
Princeton University Topology Seminar (January 30, 2025)
Institute for Advanced Study Group Theory Day (November 22, 2024)
Institute for Advanced Study "What is...?" Seminar (November 14, 2024)
McGill Geometric Group Theory Seminar (October 31, 2024)
Universite de Montreal Surfaces Learning Seminar (October 30, 2024)
2024 Fall Eastern Sectional Meeting: AMS Special Session on Geometric Group Theory, Albany (October 19-20, 2024)
Syracuse University Colloquium (October 18, 2024)
Brandeis Topology Seminar (October 8, 2024)
University of Albany Algebra/Topology Seminar (September 26, 2024)
CUNY Geometry and Topology Seminar (September 24, 2024)

Recent Mini Course

University of Hawaii: Outer Automorphisms of Free Groups (July 28th - August 1st, 2025)

Some Recorded Talks

Train Track Automata for Outer Automorphisms of Free Groups and Geodesics in Outer Space
Controlling ball progression in soccer
Stable Strata of Geodesics in Outer Space
A Dense Geodesic Ray in the Out(F_r)-quotient of Reduced Outer Space

Some Recorded Talks by Collaborators on Joint Research

Joseph Maher Work in progress on measures on the sphere
Samuel J. Taylor on Random Walks
Ilya Kapovich on Random Walks
Ilya Kapovich on Counting conjugacy classes of fully irreducibles: double exponential growth

Some Slides

A Nielsen-Thurston inspired story of iterating free group automorphisms and efficiently deforming graphs, Colloquium February 2018

(Please be aware of gross over-simplications and missing explanation.)

Symmetries, Outer Space, and the Outer Automorphism Group of the Free Group, Colloquium February 2018

(Please be aware of gross over-simplications and missing explanation.)

AMS Special Session on Boundaries for Groups and Spaces, January 2018