American Institute of Mathematical Sciences

July  1997, 3(3): 451-455. doi: 10.3934/dcds.1997.3.451

Periodic perturbations of scalar second order differential equations

 1 Dipartimento di Scienze Matematiche, Universita' Di Trieste, P.le Europa 1, 34127 Trieste, Italy 2 Dipartimento di Scienze Matematiche, Universita di Trieste, P.le Europa 1 34127 Trieste

Received  October 1996 Published  April 1997

We prove the existence of periodic solutions for perturbations of some autonomous second order nonlinear differential equations by the use of the Poincaré- Birkhoff fixed point theorem.
Citation: Paola Buttazzoni, Alessandro Fonda. Periodic perturbations of scalar second order differential equations. Discrete & Continuous Dynamical Systems - A, 1997, 3 (3) : 451-455. doi: 10.3934/dcds.1997.3.451
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