| Title | Periodic solutions to superlinear planar Hamiltonian systems |
| Publication Type | Journal Article |
| Year of Publication | 2012 |
| Authors | Boscaggin, A |
| Journal | Portugaliae Mathematica |
| Volume | 69 |
| Pagination | 127–141 |
| Abstract | We prove the existence of infinitely many periodic (harmonic and subharmonic) solutions to planar Hamiltonian systems satisfying a suitable superlinearity condition at infinity. The proof relies on the Poincare-Birkhoff fixed point theorem. |
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