Fisher-KPP 1937 travelling wave with selected minimum speed

Fisher 1937 (Ann. Eugenics 7:355) and Kolmogorov-Petrovskii-Piskunov 1937 (Bull. Univ. Moscou A 1:1) independently introduced the 1D reaction-diffusion equation u_t = r·u(1-u) + D·u_xx as a model of beneficial-allele spreading through a…