Sommario
In questo lavoro si cercano soluzioni periodiche di periodo T assegnato di sistemi dinamici. In particolare si considera un sistema di n equazioni differenziali del secondo ordine del tipo\( - \ddot x = \nabla U(x,t)\) doveU ɛC 1(ℝn x x ℝ, ℝ),U(x, t + T)=U(x,t) ∀ x ℝn, ∀t ɛ ℝ T>0. Nel caso in cui il problema sia asintoticamente lineare, con termine nonlineare limitato e in condizioni di risonanza, troviamo che esiste\(\bar T \varepsilon \mathbb{R}\) tale che per\(T > \bar T\) il sistema ha una molteplicità di soluzioni.
Summary
In this paper we look for T-periodic solutions of dynamical systems. Particularly we consider the system\( - \ddot x = \nabla U(x,t)\) whereU ɛC 1(ℝn x x ℝ, ℝ),U(x, t + T)=U(x,t) ∀ x ℝn, ∀t ɛ ℝ T>0. We assume that the problem is asymptotically linear with a bounded nonlinearity. Under a resonance assumption, we find a multiplicity of T-periodic solutions for T large enough.
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Capozzi, A., Fortunato, D. & Salvatore, A. Periodic solutions of dynamical systems. Meccanica 20, 281–284 (1985). https://doi.org/10.1007/BF02352680
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DOI: https://doi.org/10.1007/BF02352680