Kathryn Mann

4/29/24, 11:00 AM

This course will introduce mapping class groups of surfaces of infinite types, and present a perspective due to Calegari, that we might use these to study groups acting on (finite type) surfaces.

Isabelle Liousse

4/29/24, 2:00 PM

Hölder's theorem states that a group acting freely by circle homeomorphisms is isomorphic and semi-conjugate to a subgroup of rotations.

In this talk, I will discuss an analogous result, obtained with Nancy Guelman, for groups of interval exchange transformations.

Maxime Wolff

5/2/24, 2:00 PM

In joint work with Frédéric Le Roux and Kathryn Mann, we

prove that every automorphism of the group of germs at infinity

of homeomorphisms of the real line is given by the conjugation by

some homeomorphism of the line.

Emmanuel Militon

5/3/24, 11:00 AM