Comptes Rendus
no. 2
Combinatorics/Mathematical physics
Tropical curves in sandpiles

Présenté par : the Editorial Board

Nikita Kalinin1 ; Mikhail Shkolnikov1
1 Université de Genève, Section de mathématiques, route de Drize 7, villa Battelle, 1227 Carouge, Switzerland
Comptes Rendus. Mathématique, Volume 354 (2016) no. 2, pp. 125-130.

Nous considérons le modèle du tas de sable sur l'ensemble des points entiers d'un polygone entier. En ajoutant des grains de sable en certains points, on obtient une perturbation mineure de la configuration stable maximale μ≡3. Le résultat ψ∘ de la relaxation est presque partout égal à μ. On appelle lieu de déviation l'ensemble des points où ψ∘≠μ. La limite au sens de la distance de Hausdorff du lieu de déviation est une courbe tropicale spéciale, qui passe par les points de perturbation.

We study a sandpile model on the set of the lattice points in a large lattice polygon. A small perturbation ψ of the maximal stable state μ≡3 is obtained by adding extra grains at several points. It appears that the result ψ∘ of the relaxation of ψ coincides with μ almost everywhere; the set where ψ∘≠μ is called the deviation locus. The scaling limit of the deviation locus turns out to be a distinguished tropical curve passing through the perturbation points.

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crma.2015.11.003
Mots clés : Combinatorics, Mathematical physics
Nikita Kalinin 1 ; Mikhail Shkolnikov 1

1 Université de Genève, Section de mathématiques, route de Drize 7, villa Battelle, 1227 Carouge, Switzerland 
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Nikita Kalinin; Mikhail Shkolnikov. Tropical curves in sandpiles. Comptes Rendus. Mathématique, Volume 354 (2016) no. 2, pp. 125-130. doi : 10.1016/j.crma.2015.11.003. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.1016/j.crma.2015.11.003/

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☆ Research is supported in part the grant 159240 of the Swiss National Science Foundation as well as by the National Center of Competence in Research SwissMAP of the Swiss National Science Foundation.

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