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Interacting particle approximation of cross-diffusion systems

Abstract:
We prove the existence of weak solutions of a class of multi-species cross-diffusion systems as well as the propagation of chaos result by means of nonlocal approximation of the nonlinear diffusion terms, coupling methods and compactness arguments. We also prove the uniqueness under further structural assumption on the mobilities by combining the uniqueness argument for viscous porous medium equations and linear Fokker-Planck equations. We show that these equations capture the macroscopic behavior of stochastic interacting particle systems if the localisation parameter is chosen logarithmically with respect to the number of particles.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1088/1361-6544/ae3655

Authors

More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Mathematical Institute
Role:
Author
ORCID:
0000-0001-8819-4660
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Mathematical Institute
Role:
Author


Publisher:
IOP Publishing
Journal:
Nonlinearity More from this journal
Volume:
38
Issue:
2
Article number:
025009
Publication date:
2024-02-18
Acceptance date:
2026-01-09
DOI:
EISSN:
1361-6544
ISSN:
0951-7715


Language:
English
Keywords:
Pubs id:
1626327
Local pid:
pubs:1626327
Deposit date:
2026-01-10
ARK identifier:

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