Codice  QDD 158 
Titolo  Bounded solutions for a forced bounded oscillator without friction 
Data  20130607 
Autore/i  Soave, N.; Verzini, G. 
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Abstract  Under the validity of a LandesmanLazer type condition, we prove the existence of solutions bounded on the real line, together with their first derivatives, for some second order nonlinear differential equation of the form ΓΌ + g(u) = p(t), where the reaction term g is bounded. The proof is variational, and relies on a dual version of the Nehari method for the existence of oscillating solutions to superlinear equations. 
