Approximating travelling waves by equilibria of non-local equations. (English) Zbl 1248.35038

Summary: We consider an evolution equation of parabolic type in \(\mathbb{R}\) having a travelling wave solution. We study the effects on the dynamics of an appropriate change of variables which transforms the equation into a non-local evolution one having a travelling wave solution with zero speed of propagation with exactly the same profile as the original one. This procedure allows us to compute simultaneously the travelling wave profile and its propagation speed avoiding moving meshes, as we illustrate with several numerical examples. We analyze the relation of the new equation with the original one in the entire real line. We also analyze the behavior of the non-local problem in a bounded interval with appropriate boundary conditions. We show that it has a unique stationary solution which approaches the traveling wave as the interval gets larger and larger and that is asymptotically stable for large enough intervals.


35C07 Traveling wave solutions
35K58 Semilinear parabolic equations
35R09 Integro-partial differential equations
35K57 Reaction-diffusion equations
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