Polynomial-time Nielsen--Thurston type recognition

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• Richard Webb, Cambridge
• Wednesday 02 November 2016, 16:00-17:00
• MR13.

If you have a question about this talk, please contact Ivan Smith.

A cornerstone of the study of mapping class groups is the Nielsen—Thurston classification theorem. I will outline a polynomial-time algorithm that determines the Nielsen—Thurston type and the canonical reducing curve system of a mapping class. Time permitting, I shall describe a polynomial-time algorithm to compute the quotient orbifold of a periodic mapping class, and I shall discuss the conjugacy problem for the mapping class group. This is joint work with Mark Bell.

This talk is part of the Differential Geometry and Topology Seminar series.

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