Cookies

We use cookies to ensure that we give you the best experience on our website. You can change your cookie settings at any time. Otherwise, we'll assume you're OK to continue.

Department of Mathematical Sciences

Seminar Archives

On this page you can find information about seminars in this and previous academic years, where available on the database.

Pure Maths Colloquium: Rotation number, old and new

Presented by Alessandra Iozzi, ETH Zurich

15 November 2010 17:15 in CM221

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, or both.

Contact anna.felikson@durham.ac.uk for more information