Monday March 10, 2003

Speaker: David Ben-Zvi (Chicago)

Title: Solitons and Many-Body Systems in Algebraic Geometry

Abstract: A puzzling discovery of the theory of integrable systems is that the motion of the poles of meromorphic solutions to soliton equations (PDE such as the Korteweg-deVries equation) is often governed by integrable many-body systems (ODE such as the Calogero-Moser system). I will present an explanation of this phenomenon (joint work with T. Nevins) using (noncommutative) algebraic geometry. We study the space of "configurations of points on the quantum plane" and other spaces of noncommutative vector bundles as a natural bridge between solitons and particles. Namely, the soliton equations are realized as flows on these configurations, and a geometric Fourier transform converts the flows into the linear flows along tori (Jacobians of spectral curves) which give the "integration" of the many-body system.