Monthly Archives: May 2012

BI: Teichmüller space, part I

Posted on May 6, 2012 by

It is a remarkable fact that the group of orientation-preserving isometries of can be identified with the group of bi-holomorphisms of the unit disk in . [Fun fact: Poincaré said that he discovered (basically) this while stepping on a bus.] … Continue reading →

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Just for fun: trefoil knot complement cake

Posted on May 2, 2012 by

Based on a joint work with Rob Clancy, presented at the Oxford Mathematical Cake Seminar. You might think that this is just a regular cake. But it’s not! The icing is in the shape of a trefoil knot, so that … Continue reading →

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