Steven Frankel, Washington University in Saint Louis

October 20, 2017 - 4:00pm to 5:00pm

Cupples I, room 6

*Abstract: On a 3-manifold, certain geometric and dynamical objects can be understood “at infinity” in terms of a “universal circle,” a topological circle equipped with an action of the fundamental group. These circles arise, for example, from taut foliations, quasigeodesic flows, and pseudo-Anosov flows. In this talk we will outline the construction of these circles, and discuss several conjectures that use them as a bridge between the structure of the flow or foliation and the geometry and topology of the underlying manifold.*

*Host: Xiang Tang*