Type: Seminar

Modified: Thu 19 Mar 2015 1349

Distribution: World

Expiry: 1 Jan 2016

CalTitle1: CANCELLED Joint Colloquium: Zsuzsanna Dancso -- The Kashiwara-Vergne problem and flying rings in R^3 CANCELLED

Auth: leo@dyn-129-78-251-134.wirelessguest.usyd.edu.au (ltzo2369) in SMS-WASM

THIS TALK IS CANCELLED The Kashiwara-Vergne problem is a property of the Baker-Campbell-Haussdorff series which has strong consequences in Lie theory and harmonic analysis. It was conjectured in the 70’s and first proven in 2006 by Alekseev and Meinrenken. I will describe a procedure whose input is a structure in topology (typically some class of knotted objects) and whose output is a set of equations in a graded space. I’ll explain how this leads to a one-to-one correspondence between solutions to the Kashiwara-Vergne problem and certain invariants of a class of knotted tubes in R^4. If time allows, I’ll also discuss how this gives rise to a new topological proof of the Kashiwara-Vergne problem, and provides an intuitive explanation for the connection between the Kashiwara-Vergne equations and Drinfel’d associators. Joint work with Dror Bar-Natan; the talk is aimed at a general mathematics audience.