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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: How many elements does a surface group have?

Presented by Yiannis Petridis , University College London

4 November 2013 16:00 in CM221

The easy answer is infinite. We will see how to measure the size of such infinite groups by looking at their action on hyperbolic space. The surface groups grow exponentially, as least as a first approximation. I will try to explain better approximations and how they relate to (a) the spectral theory of the Laplace operator (b) counting problems in number theory.

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