Multiplicity of supercritical fronts for reaction-diffusion equations in cylinders

Details Multiplicity of supercritical fronts for reaction-diffusion equations in cylinders Multiplicity of supercritical fronts for reaction-diffusion equations in cylinders

2011-09-10

arxiv.org/abs/1109.2194v1

Mathematics

Analysis of PDEs

Scientific paper

We study multiplicity of the supercritical traveling front solutions for scalar reaction-diffusion equations in infinite cylinders which invade a linearly unstable equilibrium. These equations are known to possess traveling wave solutions connecting an unstable equilibrium to the closest stable equilibrium for all speeds exceeding a critical value. We show that these are, in fact, the only traveling front solutions in the considered problems for sufficiently large speeds. In addition, we show that other traveling fronts connecting to the unstable equilibrium may exist in a certain range of the wave speed. These results are obtained with the help of a variational characterization of such solutions.

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