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The purpose of this work is to introduce a concept of traveling waves in the setting of periodic metric graphs. It is known that the nonlinear Schr{\"o}dinger (NLS) equation on periodic metric graphs can be reduced asymptotically on long…

Analysis of PDEs · Mathematics 2025-05-07 Stefan Le Coz , Dmitry E. Pelinovsky , Guido Schneider

We show the relevance of the nonlinear Fisher and Kolmogorov-Petrovsky- Piscounov (KPP) equation to the problem of high energy evolution of the QCD amplitudes. We explain how the traveling wave solutions of this equation are related to…

High Energy Physics - Phenomenology · Physics 2008-11-26 S. Munier , R. Peschanski

The study of nonlocal nonlinear systems and their dynamics is a rapidly increasing field of research. In this study, we take a closer look at the extended nonlocal Kadomtsev-Petviashvili (enKP) model through a systematic analysis of…

Pattern Formation and Solitons · Physics 2023-08-21 K. Sakkaravarthi , Sudhir Singh , N. Karjanto

Classical results concerning Klein-Gordon-Maxwell type systems are shortly reviewed and generalized to the setting of mixed local-nonlocal operators, where the nonlocal one is allowed to be nonpositive definite according to a real…

Analysis of PDEs · Mathematics 2023-11-07 Nicolò Cangiotti , Maicol Caponi , Alberto Maione , Enzo Vitillaro

In this paper, we investigate a Fisher-KPP nonlocal diffusion model incorporating the effect of advection and free boundaries, aiming to explore the propagation dynamics of the nonlocal diffusion-advection model. Considering the effects of…

Analysis of PDEs · Mathematics 2023-09-13 Chengcheng Cheng

We study traveling waves of the KPP equation in the half-space with Dirichlet boundary conditions. We show that minimal-speed waves are unique up to translation and rotation but faster waves are not. We represent our waves as Laplace…

Analysis of PDEs · Mathematics 2023-08-15 Julien Berestycki , Cole Graham , Yujin H. Kim , Bastien Mallein

We study a Klein-Gordon-Maxwell system, in a bounded spatial domain, under Neumann boundary conditions on the electric potential. We allow a nonconstant coupling coefficient. For sufficiently small data, we find infinitely many standing…

Analysis of PDEs · Mathematics 2019-12-03 Monica Lazzo , Lorenzo Pisani

We introduce a model for nonlinear viscoelastic solids where traveling shear waves with compact support are possible. We obtain an exact compact solution. We also derive a new Burger's type evolution equation associated with the introduced…

Pattern Formation and Solitons · Physics 2013-03-06 Michel Destrade , Pedro M. Jordan , Giuseppe Saccomandi

We show that there exist traveling wave solutions of the Keller-Segel-FKPP equation, which models a diffusing and logistically growing population subject to chemotaxis. In contrast to previous results, our result is in the strong…

Analysis of PDEs · Mathematics 2023-10-24 Christopher Henderson , Maximilian Rezek

We outline a general theory for the analysis of flow-distributed standing and travelling wave patterns in one-dimensional, open plug-flows of oscillatory chemical media. We treat both the amplitude and phase dynamics of small and…

Pattern Formation and Solitons · Physics 2009-11-10 Patrick N. McGraw , Michael Menzinger

Non-cooperative Fisher-KPP systems with space-time periodic coefficients are motivated for instance by models for structured populations evolving in periodic environments. This paper is concerned with entire solutions describing the…

Analysis of PDEs · Mathematics 2026-02-09 Léo Girardin , Grégoire Nadin

We study the limits of the additive and derivative martingales of one-dimensional branching Brownian motion in a periodic environment. Then we prove the existence of pulsating travelling wave solutions of the corresponding F-KPP equation in…

Probability · Mathematics 2022-02-24 Yan-Xia Ren , Renming Song , Fan Yang

We prove the existence of periodic travelling wave solutions for general discrete nonlinear Klein-Gordon systems, considering both cases of hard and soft on-site potentials. In the case of hard on-site potentials we implement a fixed point…

Analysis of PDEs · Mathematics 2023-07-21 Dirk Hennig , Nikos I. Karachalios

We construct topological invariants, called abstract weak orbit spaces, of flows and homeomorphisms on topological spaces, to describe both gradient dynamics and recurrent dynamics. In particular, the abstract weak orbit spaces of flows on…

Dynamical Systems · Mathematics 2020-12-03 Tomoo Yokoyama

In the early 2000's, Gourley (2000), Wu et al. (2001), Ashwin et al. (2002) initiated the study of the positive wavefronts in the delayed Kolmogorov-Petrovskii-Piskunov-Fisher equation. Since then, this model has become one of the most…

Classical Analysis and ODEs · Mathematics 2011-10-11 Adrian Gomez , Sergei Trofimchuk

Asymptotic reductions of a defocusing nonlocal nonlinear Schr\"{o}dinger model in $(3+1)$-dimensions, in both Cartesian and cylindrical geometry, are presented. First, at an intermediate stage, a Boussinesq equation is derived, and then its…

Pattern Formation and Solitons · Physics 2016-05-04 Theodoros P. Horikis , Dimitrios J. Frantzeskakis

We address the uniqueness of the nonzero stationary state for a reaction-diffusion system of Fisher-KPP type that does not satisfy the comparison principle. Although the uniqueness is false in general, it turns out to be true under…

Analysis of PDEs · Mathematics 2020-03-17 Léo Girardin , Quentin Griette

We consider a parabolic partial differential equation that can be understood as a simple model for crowds flows. Our main assumption is that the diffusivity and the source/sink term vanish at the same point; the nonhomogeneous term is…

Analysis of PDEs · Mathematics 2017-02-20 Andrea Corli , Lorenzo di Ruvo , Luisa Malaguti

The aim of this paper is to study the generalized Fisher-KPP equation with nonlocal diffusion. In specific we prove the existence of a critical speed so that traveling front type solutions exist up to this critical speed and non-existence…

Analysis of PDEs · Mathematics 2021-04-28 José Fuentealba , Alexander Quaas

We investigate the existence of periodic solutions for a class of nonlocal continuity equations, which include mean-field equations derived from systems of coupled oscillators. While periodic solutions at the particle level have been…

Dynamical Systems · Mathematics 2026-02-24 Seung-Yeal Ha , Gyuyoung Hwang , Philippe Thieullen , Jaeyoung Yoon