9 citations · 33 across the 7 of their papers we have counts for
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math.CA2024
A Poincaré-Birkhoff theorem for multivalued successor maps with applications to periodic superlinear Hamiltonian systems
Guglielmo Feltrin, Alessandro Fonda, Andrea Sfecci
We provide a new version of the Poincaré-Birkhoff theorem for possibly multivalued successor maps associated with planar non-autonomous Hamiltonian systems. As an application, we p…
math.CA2015★ 8 cited
Double resonance for one-sided superlinear or singular nonlinearities
Andrea Sfecci
We deal with the problem of existence of periodic solutions for the scalar differential equation x" + f (t, x) = 0 when the asymmetric nonlinearity satisfies a one-sided superlinea…
math.CA2015★ 3 cited
Periodic impact motions at resonance of a particle bouncing on spheres and cylinders
Andrea Sfecci
We investigate the existence of periodic trajectories of a particle, subject to a central force, which can hit a sphere, or a cylinder. We will provide also a Landesman-Lazer type…