Accepted Paper

Inserted: 5 aug 2025
Last Updated: 27 mar 2026

Journal: Ann. Sc. Norm. Super. Pisa Cl. Sci.
Year: 2026

Abstract:

We consider a Hamiltonian system of free boundary type, showing first uniform bounds and existence of solutions and of the free boundary. Then, for any smooth and bounded domain, we prove uniqueness of positive solutions in a suitable interval and show that the associated energies and boundary values have a monotonic behavior. Some consequences are discussed about the parametrization of the unbounded Rabinowitz continuum for a class of superlinear strongly coupled elliptic systems.