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On weak KAM theory for N-body problems

Published online by Cambridge University Press:  27 April 2011

EZEQUIEL MADERNA
EZEQUIEL MADERNA*
Affiliation:
CMAT, Centro de Matemática, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay (email: emaderna@cmat.edu.uy)
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Abstract

We consider N-body problems with potential 1/r2κ, where κ∈(0,1), including the Newtonian case (κ=1/2). Given R>0 and T>0, we find a uniform upper bound for the minimal action of paths binding, in time T, any two configurations which are contained in some ball of radius R. Using cluster partitions, we obtain from these estimates the Hölder regularity of the critical action potential (i.e. of the minimal action of paths binding two configurations in free time). As an application, we establish the weak KAM theorem for these N-body problems, i.e. we prove the existence of fixed points of the Lax–Oleinik semigroup, and we show that they are global viscosity solutions of the corresponding Hamilton–Jacobi equation. We also prove that there are invariant solutions for the action of isometries on the configuration space.

Type
Research Article
Information
Ergodic Theory and Dynamical Systems , Volume 32 , Issue 3 , June 2012 , pp. 1019 - 1041
Copyright
Copyright © Cambridge University Press 2011

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