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DOI10.13763/J.CNKI.JHEBNU.NSE.2019.06.003zbMath1449.37044MaRDI QIDQ3307725

Xingfan Chen, Lingling Zheng

Publication date: 12 August 2020

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

perturbation periodic solution saddle point theorem second-order Hamiltonian system

Mathematics Subject Classification ID

Perturbations of finite-dimensional Hamiltonian systems, normal forms, small divisors, KAM theory, Arnol'd diffusion (37J40) Periodic, homoclinic and heteroclinic orbits of finite-dimensional Hamiltonian systems (37J46)

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An extension of the Poincaré-Birkhoff theorem coupling twist with lower and upper solutions

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