Special Session 103: Elliptic, parabolic problems and functional inequalities

Generic configurations in 2D strongly competing systems

Flavia Lanzara
Mathematics Department, Sapienza University, Rome
Italy
Co-Author(s):    E. Montefusco, V. Nesi, E. Spadaro
Abstract:
We study some qualitative properties of the solutions to a segregation limit problem in planar domains. The main goal is to show that, generically, the limit configuration of \(N\) interacting populations consists of a partition of the domain whose singular points are \(N-2\) triple points, meaning that at most three populations meet at any point on the free boundary. To achieve this, we relate the solutions of the problem to a particular class of harmonic maps in singular spaces, which can be seen as the real part of certain holomorphic functions.The genericity result is obtained by perturbation arguments. This is a joint work with E. Montefusco, V. Nesi and E. Spadaro (Mathematics Department, Sapienza University, Rome, Italy).