Subharmonic solutions of planar Hamiltonian systems via the Poincaré́-Birkhoff theorem
Abstract
We revisit some recent results obtained in [1] about the existence of subharmonic solutions for a class of (nonautonomous) planar Hamiltonian systems, and we compare them with the existing literature. New applications to undamped second order equations are discussed, as well.The authors retain all rights to the original work without any restrictions.
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