Prof. Dr. Alessandra Iozzi, ETH Zürich, Vortrag: Rotation number, old and newer
Thursday, 30.06.2016 16:30 im Raum M5
Rotation numbers classify orientation preserving homeomorphisms of the
circle (hence actions of the integers) up to semiconjugacy. After recalling the classical theory,
we will show how one can generalize the notion of rotation number both to actions of groups
larger than the integers and to actions on manifolds more complicated than the circle.
As an application, we will illustrate some rigidity results.