Stochastic Mean-Field Limit: Non-Lipschitz Forces \& Swarming

Details Stochastic Mean-Field Limit: Non-Lipschitz Forces \& Swarming Stochastic Mean-Field Limit: Non-Lipschitz Forces \& Swarming

2010-09-27

arxiv.org/abs/1009.5166v2

Mathematical Models and Methods in Applied Sciences 21, 11 (2011) 2179-2210

Mathematics

Probability

Scientific paper

We consider general stochastic systems of interacting particles with noise which are relevant as models for the collective behavior of animals, and rigorously prove that in the mean-field limit the system is close to the solution of a kinetic PDE. Our aim is to include models widely studied in the literature such as the Cucker-Smale model, adding noise to the behavior of individuals. The difficulty, as compared to the classical case of globally Lipschitz potentials, is that in several models the interaction potential between particles is only locally Lipschitz, the local Lipschitz constant growing to infinity with the size of the region considered. With this in mind, we present an extension of the classical theory for globally Lipschitz interactions, which works for only locally Lipschitz ones.

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