Higher dimensional Birkhoff attractors (with an appendix by Maxime Zavidovique)
[Attracteurs de Birkhoff en toutes dimensions]
Journal de l’École polytechnique — Mathématiques, Tome 13 (2026), pp. 759-808

We extend to higher dimensions the notion of Birkhoff attractor of a dissipative map. We prove that this notion coincides with the classical Birkhoff attractor. We prove that for the dissipative system associated to the discounted Hamilton-Jacobi equation, the graph of the solution is contained in the Birkhoff attractor. The appendix provides instructive counter-examples in the non-Tonelli case. We also study what happens when we perturb a Hamiltonian system to make it dissipative and let the perturbation go to zero. The paper contains two main results on $\gamma $-supports and elements of the $\gamma $-completion of the space of exact Lagrangians. Firstly the $\gamma $-support of a Lagrangian in a cotangent bundle carries the cohomology of the base and secondly given an exact Lagrangian $L$, any Floer theoretic equivalent Lagrangian is the $\gamma $-limit of Hamiltonian images of $L$.

Nous généralisons en dimension supérieure la notion d’attracteur de Birkhoff des applications dissipatives. Nous montrons que celle-ci coïncide avec l’attracteur de Birkhoff classique en dimension $2$. Nous prouvons que pour les systèmes dissipatifs associés à l’équation de Hamilton-Jacobi escomptée pour des hamiltoniens Tonelli, le graphe de la différentielle de la solution est contenu dans l’attracteur de Birkhoff. L’appendice fournit des contre-exemples lorsque le hamiltonien n’est pas Tonelli. Nous étudions aussi la perturbation d’un système hamiltonien de manière à le rendre dissipatif, lorsque la perturbation tend vers $0$. Cet article contient deux résultats sur les supports et les éléments de la complétion de l’espace des lagrangiennes exactes. Tout d’abord, le support d’une lagrangienne compacte d’un fibré cotangent porte la cohomologie de la base, et ensuite, étant donnée une lagrangienne exacte $L$ , toute lagrangienne qui lui est Floer équivalente est la $\gamma $-limite d’images hamiltoniennes de $L$.

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DOI : 10.5802/jep.336
Classification : 35D40, 37C70, 37E40, 53D12, 57R17
Keywords: Conformally symplectic dynamics, viscosity solutions, Lagrangian submanifolds, spectral distance, $\gamma $-support, nearby Lagrangian conjecture
Mots-clés : Dynamique conformément symplectique, solutions de viscosité, sous-variétés lagrangiennes, distance spectrale, $\gamma $-support, conjecture de la lagrangienne proche

Marie-Claude Arnaud  1   ; Vincent Humilière  2   ; Claude Viterbo  3

1 Université Paris Cité and Sorbonne Université, CNRS, IMJ-PRG, F-75005 Paris, France
2 Sorbonne Université and Université Paris Cité, CNRS, IMJ-PRG, F-75005 Paris, France
3 Université Paris-Saclay, CNRS, Laboratoire de mathématiques d’Orsay, 91405, Orsay, France
Licence : CC-BY 4.0
Droits d'auteur : Les auteurs conservent leurs droits
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     title = {Higher dimensional {Birkhoff} attractors (with an appendix by {Maxime} {Zavidovique)}},
     journal = {Journal de l{\textquoteright}\'Ecole polytechnique {\textemdash} Math\'ematiques},
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Marie-Claude Arnaud; Vincent Humilière; Claude Viterbo. Higher dimensional Birkhoff attractors (with an appendix by Maxime Zavidovique). Journal de l’École polytechnique — Mathématiques, Tome 13 (2026), pp. 759-808. doi: 10.5802/jep.336

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