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EXTRA SEMINAR! Circular orderings from veering triangulations


Speaker: Saul Schleimer, Warwick University/MSRI
Location: 2112 MSB
Start time: Fri, Dec 2 2016, 3:10PM

This is joint work with Henry Segerman. Suppose that (M,T) is a cusped hyperbolic three-manifold equipped with a veering triangulation. We show that there is a unique circular order on the cusps of the universal cover of M, which is compatible with T. I will give the necessary background on the topology of three-manifolds and the combinatorics of triangulation, with lots of pictures; then I will sketch the algorithmic construction of the circular order. We'll end with a collection of open questions.