(HoRSe seminar) Joyce-Song wall-crossing as an asymptotic expansion II

(HoRSe seminar) Joyce-Song wall-crossing as an asymptotic expansion II

Tue, 06/03/2012
15:45 		Jacopo Stoppa (Cambridge) Algebraic and Symplectic Geometry Seminar Add to calendar L3
(HoRSe seminar) Joyce-Song wall-crossing as an asymptotic expansion II
Joyce and Song expressed the wall-crossing behaviour of Donaldson-Thomas invariants using a sum over graphs. Joyce expected that these would have something to do with the Feynman diagrams of suitable physical theories. I will show how this can be achieved in the framework for wall-crossing proposed by Gaiotto, Moore and Neitzke. JS diagrams emerge from small corrections to a hyperkahler metric. The basics of GMN theory will be explained during the first talk.