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The critical wave speed for the Fisher–Kolmogorov–Petrowskii–Piscounov equation with cut-off
The Fisher–Kolmogorov–Petrowskii–Piscounov (FKPP) equation with cut-off was introduced in (Brunet and Derrida 1997 Shift in the velocity of a front due to a cut-off Phys. Rev. E 56 2597–604) to model N-particle systems in which concentrations less than ε = 1/N are not attainable. It was conjectured that the cut-off …