Semiflows strongly focusing monotone with respect to high-rank cones: II. Pseudo-ordered principle

We consider a semiflow strongly focusing monotone with respect to a cone of rank k on a Banach space. We prove that the omega-limit set of a pseudo-ordered semiorbit is ordered, which is called as pseudo-ordered principle. Based on this principle, we obtain the solid Poincar{‘}e-Bendixson theorem with the rank k=2, that is, the omega-limit set of a pseudo-ordered semiorbit is either a nontrivial periodic orbit or a set consisting of equilibria with their potential connected orbits. The generic solid dynamics theorem with a general rank k and the generic solid Poincar{’}e-Bendixson theorem with the rank k=2 are also obtained.