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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: Real Belyi Theory

Presented by Bernhard Koeck, University of Southampton

30 October 2006 16:00 in CM221

Belyi's famous theorem states that a compact Riemann surface can
be defined over a number field if and only if it admits a meromorphic
function with at most three critical values. My talk will be about a
generalization of this theorem to Klein surfaces, i.e. (possibly
non-orientable) surfaces with boundary which carry a dianalytic structure. I
will also explain some other characterizations (triangle groups, maps on
surfaces, ...) David Sigerman and I have obtained.

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