REGULAR SOLUTIONS AND GLOBAL ATTRACTORS FOR REACTION-DIFFUSION SYSTEMS WITHOUT UNIQUENES

摘要

In this paper we study the structural properties of global attractors of multi-valued semiflows generated by regular solutions of reaction-diffusion system without uniqueness of the Cauchy problem. Under additional gradient-like condition on the nonlinear term we prove that the global attractor coincides with the unstable manifold of the set of stationary points, and with the stable one when we consider only bounded complete trajectories. As an example we consider a generalized Fitz-Hugh-Nagumo system. We also suggest additional conditions, which provide that the global attractor is a bounded set in (L-infinity(Omega))(N) and compact in (H-0(1)(Omega))(N).