WELL-POSEDNESS OF A CROSS-DIFFUSION POPULATION MODEL WITH NONLOCAL DIFFUSION

We prove the existence and uniqueness of a solution of a nonlocal cross-diffusion competitive population model for two species. The model may be considered as a version, or even an approximation, of the paradigmatic Shigesada-Kawasaki-Teramoto cross-diffusion model, in which the usual diffusion differential operator is replaced by an integral diffusion operator. The proof of existence of solutions is based on a compactness argument, while the uniqueness of the solution is achieved through a duality technique.