Speaker: Hidekazu Furusho (Nagoya University)
Title: Survey of Drinfel'd's work on GT and its associated quantumn groups

Abstract : I will give an overview of Drinfel'd's paper "On quasitriangular quasi-Hopf algebras and a group closely connected with Gal_Q" (Leningrad Math. J, 1991). I will talk about his notion of quasi-triangular quasi-Hopf quantized universal enveloping algebras. I will explain how it relates to the Knizhnik-Zamolodchikov equation and the Yang-Baxter equation and how he comes to define the Grothendieck-Teichmuller group.