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Multichromatic travelling waves for lattice Nagumo equations

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  • Hupkes, Hermen Jan
  • Morelli, Leonardo
  • Stehlík, Petr
  • Švígler, Vladimír

Abstract

We discuss multichromatic front solutions to the bistable Nagumo lattice differential equation. Such fronts connect the stable spatially homogeneous equilibria with spatially heterogeneous n-periodic equilibria and hence are not monotonic like the standard monochromatic fronts. In contrast to the bichromatic case, our results show that these multichromatic fronts can disappear and reappear as the diffusion coefficient is increased. In addition, these multichromatic waves can travel in parameter regimes where the monochromatic fronts are also free to travel. This leads to intricate collision processes where an incoming multichromatic wave can reverse its direction and turn into a monochromatic wave.

Suggested Citation

  • Hupkes, Hermen Jan & Morelli, Leonardo & Stehlík, Petr & Švígler, Vladimír, 2019. "Multichromatic travelling waves for lattice Nagumo equations," Applied Mathematics and Computation, Elsevier, vol. 361(C), pages 430-452.
    • Handle: RePEc:eee:apmaco:v:361:y:2019:i:c:p:430-452
    DOI: 10.1016/j.amc.2019.05.036
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