Confinement in nonlocal interaction equations

J.A. Carrillo, M. Di Francesco, A. Figalli, T. Laurent, D. Slepčev

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We investigate some dynamical properties of nonlocal interaction equations. We consider sets of particles interacting pairwise via a potential W, as well as continuum descriptions of such systems. The typical potentials we consider are repulsive at short distances, but attractive at long distances. The main question we consider is whether an initially localized configuration remains localized for all times, regardless of the number of particles or their arrangement. In particular we find sufficient conditions on the potential W for the above "confinement" property to hold. We use the framework of weak measure solutions developed in Carrillo et al. (2011) [2] to provide unified treatment of both particle and continuum systems.
Original languageEnglish
Pages (from-to)550-558
Number of pages9
JournalNonlinear Analysis: Theory Methods & Applications
Issue number2
Publication statusPublished - 1 Jan 2012


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