Nonlinear Graphon mean-field systems

We address a system of weakly interacting particles where the heterogenous connections among the particles are described by a graph sequence and the number of particles grows to infinity. Our results extend the existing law of large numbers and propagation of chaos results to the case where the inte...

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Bibliographic Details
Published in:arXiv.org 2024-06
Main Authors: Coppini, Fabio, De Crescenzo, Anna, Pham, Huyen
Format: Article
Language:English
Subjects:
Decoupling method
Infinity
Online Access:Get full text
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Summary:We address a system of weakly interacting particles where the heterogenous connections among the particles are described by a graph sequence and the number of particles grows to infinity. Our results extend the existing law of large numbers and propagation of chaos results to the case where the interaction between one particle and its neighbors is expressed as a nonlinear function of the local empirical measure. In the limit of the number of particles which tends to infinity, if the graph sequence converges to a graphon, then we show that the limit system is described by an infinite collection of processes and can be seen as a process in a suitable \(L^2\) space constructed via a Fubini extension. The proof is built on decoupling techniques and careful estimates of the Wasserstein distance.
ISSN:2331-8422