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Probability and Combinatorics

Tuesday, April 24, 2018 - 3:00pm

Zhenfu Wang

University of Pennsylvania


University of Pennsylvania


We present a new method to derive quantitative estimates proving the propagation of chaos for large stochastic or deterministic systems of interacting particles. Our approach requires to prove large deviations estimates for non-continuous potentials modified by the limiting law. But it leads to explicit bounds on the relative entropy between the joint law of the particles and the tensorized law at the limit; and it can be applied to very singular kernels that are only in negative Sobolev spaces and include the Biot-Savart law for 2D Navier-Stokes and 2D Euler.  Joint work with P.-E. Jabin.