A well-posedness theory in measures for some kinetic models of collective motion

José A. Cañizo, José A. Carrillo, Jesús Rosado

Research output: Contribution to journalArticlepeer-review

168 Citations (Scopus)


We present existence, uniqueness and continuous dependence results for some kinetic equations motivated by models for the collective behavior of large groups of individuals. Models of this kind have been recently proposed to study the behavior of large groups of animals, such as flocks of birds, swarms, or schools of fish. Our aim is to give a well-posedness theory for general models which possibly include a variety of effects: an interaction through a potential, such as a short-range repulsion and long-range attraction; a velocity-averaging effect where individuals try to adapt their own velocity to that of other individuals in their surroundings; and self-propulsion effects, which take into account effects on one individual that are independent of the others. We develop our theory in a space of measures, using mass transportation distances. As consequences of our theory we show also the convergence of particle systems to their corresponding kinetic equations, and the local-in-time convergence to the hydrodynamic limit for one of the models.
Original languageEnglish
Pages (from-to)515-539
Number of pages25
JournalMathematical Models and Methods in Applied Sciences
Issue number3
Publication statusPublished - 1 Mar 2011


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