Speaker: Prof. Burglind Juhl-Jöricke (ANU) http://guests.mpim-bonn.mpg.de/joericke/aboutme2009.html Time: Thursday, Oct. 17, 12NOON--1PM Room: Carslaw 707A Lunch: after the talk, at Law Annex Cafe. ---------------------------------------------- Title: Braids, Conformal Module and Entropy Abstract: I will discuss two invariants of conjugacy classes of braids and some of their applications. The first invariant is the conformal module which implicitly occurred already in a paper of Gorin and Lin in connection with their interest in the 13th Hilbert problem. The second is a popular dynamical invariant, the entropy. It occurred in connection with Thurston’s theory of surface homeomorphisms. It turns out that these invariants are related: They are inverse proportional. ---------------------------------------------- Seminar website: http://www.maths.usyd.edu.au/u/SemConf/Geometry/