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Richard Webb, Cambridge
Wednesday 02 November 2016, 16:00-17:00
Polynomial-time Nielsen--Thurston type recognition
- 👤 Speaker: Richard Webb, Cambridge
- 📅 Date & Time: Wednesday 02 November 2016, 16:00 - 17:00
- 📍 Venue: MR13
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Ivan Smith
Abstract
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.
Series This talk is part of the Differential Geometry and Topology Seminar series.
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