SMS scnews item created by Kevin Coulembier at Thu 3 Aug 2017 1332
Type: Seminar
Distribution: World
Expiry: 28 Sep 2017
Calendar1: 18 Aug 2017 1200-1300
CalLoc1: Carslaw 375
CalTitle1: Algebra Seminar: The Dogma is Wrong
Auth: (kcou7211) in SMS-WASM

Algebra Seminar: Bar-Natan -- The Dogma is Wrong

Dror Bar-Natan (University of Toronto) 

Friday 18 August, 12-1pm, Place: Carslaw 375 

Title: The Dogma is Wrong 

Abstract: It has long been known that there are knot invariants associated to
semi-simple Lie algebras, and there has long been a dogma as for how to extract them:
"quantize and use representation theory".  We present an alternative and better
procedure: "centrally extend, approximate by solvable, and learn how to re-order
exponentials in a universal enveloping algebra".  While equivalent to the old invariants
via a complicated process, our invariants are in practice stronger, faster to compute
(poly-time vs.  exp-time), and clearly carry topological information.  

This is joint work with Roland van der Veen and continues work by Rozansky and Overbay.

If you are registered you may mark the scnews item as read.
School members may try to .