A Christmas theorem and a short proof
Friday 15th January, 2010 16:00-17:00 Mathematics Building, room 325
This is not a research seminar! What I'll talk about I'd like to keep a surprise, but it is a classical number theory problem and in particular one beautiful theorem. We will discuss two very different proofs. Both are elementary, i.e. no specialized knowledge is required to understand them, except the basic number theory concepts of divisibility and modular arithmetic.