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This paper is concerned with non-cooperative parabolic reaction–diffusion systems which share structural similarities with the scalar Fisher–KPP equation. These similarities make it possible to prove, among other results, an extinction and persistence dichotomy and, when persistence occurs, the existence of a positive steady state, the existence of traveling waves with a halfline of possible speeds and a positive minimal speed and the equality between this minimal speed and the spreading speed for the Cauchy problem. Noncooperative KPP systems can model various phenomena where the following three mechanisms occur: local diffusion in space, linear cooperation and superlinear competition.

Addendum to ‘Non-cooperative Fisher–KPP systems: traveling waves and long-time behavior’