Fisher 1937 / KPP 1937 reaction-diffusion u_t = D u_xx + r u (1-u); admits stable traveling-wavefront with speed c* = 2 sqrt(rD); models advantageous-allele spread + invasion fronts.
Fisher 1937 / KPP 1937 reaction-diffusion u_t = D u_xx + r u (1-u); admits stable traveling-wavefront with speed c* = 2 sqrt(rD); models advantageous-allele spread + invasion fronts.