## 3-Manifold Seminar: Tait colorings and instanton homology (continued)

Seminar | April 10 | 12:40-2 p.m. | 891 Evans Hall

Ian Agol, UC Berkeley

Department of Mathematics

We'll discuss Kronheimer-Mrowka's twisted instanton invariant of webs and foam cobordisms. The rank of this invariant for planar webs gives the number of Tait colorings, but the torsion can contain more information (in particular, admits a spectral sequence to their previous untwisted invariant).

events@math.berkeley.edu