COLLOQUIUM
3:00 p.m., Wednesday (March 11, 2009)
WMAX 110 (PIMS)
Yongbin Ruan
University of Michigan
Integrable hierarchies and singularity theory
Abstract: Almost twenty years ago, the celebrated theorem of WittenKontsevich asserted that the intersection theory of DeligneMumford space is governed by KdVhierarchies. Around the same time, Witten proposed a sweeping generalization which leads to the representation theory of infinite dimensional Lie algebras and singularity theory. In the talk, we will sketch the recent resolution of Witten's vision by FanJarvis and the author and the appearance of new phenomena such as mirror symmetry in the integrable hierarchy problem.
Refreshments will be served at 2:45 p.m. (1st Flr Lounge at PIMS).
