Witten Equation and Singularity Theory

COMPLEX ALGEBRAIC GEOMETRY
Topic:Witten Equation and Singularity Theory
Speaker:Yongbin Ruan
Affiliation:University of Michigan
Date:Thursday, December 7
Time/Room:12:00pm - 1:00pm/S-101

In 1991, Witten proposed a famous conjecture (solved by Kontsevich) related the intersection theory of Deligne-Mumford moduli space to KDV-integrable hierearchy. To generalize his conjecture, Witten proposed a remarkable PDE based any quasihomogeneous singularity. The moduli problem of Witten equation was conjectured to be the generalization of the intersection theory of Deligne-Mumford moduli space and related to more general KP-hierarchy. In the talk, we will present a scheme to solve the moduli problem of Witten equation. In particular, we will give an affirmative answer to Witten's conjecture. Furthermore, our model leads to a construction of Landou-Ginzburg A-model, which is still missing in physics. Possible future application will be discussed.