Galois Group: How to Count
Wednesday 8th November, 1pm in G.209 Alan Turing Building for a lecture by Tom Kempton.
How many sides does a square have? We'll begin by looking at an easy argument (a kind of inverse pigeon-hole principle using measures) that the answer must be at least four. I'll then spend the rest of the time trying to convince you that this technique isn't completely stupid, and that for some other counting problems in number theory and geometry we can say some clever things.