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Convergence in competition models with small diffusion coefficients
Authors:V. Hutson  K. Mischaikow
Affiliation:a Department of Applied Mathematics, Sheffield University, Sheffield S3 7RH, UK
b Department of Mathematics, The Ohio State University, 231 W. 18th Avenue, Columbus, OH 43210, USA
c Center for Dynamical Systems and Nonlinear Studies, School of Mathematics, Georgia Institute of Technology, Atlanta, GA 30332, USA
Abstract:It is well known that for reaction-diffusion 2-species Lotka-Volterra competition models with spatially independent reaction terms, global stability of an equilibrium for the reaction system implies global stability for the reaction-diffusion system. This is not in general true for spatially inhomogeneous models. We show here that for an important range of such models, for small enough diffusion coefficients, global convergence to an equilibrium holds for the reaction-diffusion system, if for each point in space the reaction system has a globally attracting hyperbolic equilibrium. This work is planned as an initial step towards understanding the connection between the asymptotics of reaction-diffusion systems with small diffusion coefficients and that of the corresponding reaction systems.
Keywords:Reaction-diffusion   Competing species   Spatial inhomogeneity   Small diffusion limit   Asymptotic dynamics
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