Preprints, Working Papers, ... Year : 2025

Infinitely many saturated travelling waves for epidemic models with distributed-contacts

Abstract

We consider an epidemic model with distributed-contacts. When the contact kernel concentrates, one formally reaches a very degenerate Fisher-KPP equation with a diffusion term that is not in divergence form. We make an exhaustive study of its travelling waves. For every admissible speed, there exists not only a non-saturated (smooth) wave but also infinitely many saturated (sharp) ones. Furthermore their tails may differ from what is usually expected. These results are thus in sharp contrast with their counterparts on related models.

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hal-04951055 , version 1 (17-02-2025)
hal-04951055 , version 2 (24-10-2025)

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Matthieu Alfaro, Maxime Herda, Andrea Natale. Infinitely many saturated travelling waves for epidemic models with distributed-contacts. 2025. ⟨hal-04951055v1⟩
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