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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: The Octagonal PET

Presented by Richard Schwartz, Brown University

28 January 2013 16:00 in CM221

Imagine a wooden puzzle, made from a big polyhedron that can be cut up into "the same" polyhedra and reassembled
in two different ways. Such a puzzle defines what is called a polyhedron exchange transformation, or PET for
short. In my talk, I will explain some of the beautiful properties of PETs and then concentrate on a family of them which I recently studied in a lot of detail. Along the way, I'll explain, in simple terms, an important idea from dynamics, called renormalization.

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