Subharmonics and homoclinics for a class of Hamiltonian-like equations

revised version: September 2009
Percy Makita
(Please use for correspondence this email).

Submission date: 20. Jul. 2009
Pages: 23
MSC-Numbers: 34C25, 34C37, 37K60
Keywords and phrases: Advanced-delayed differential equations, critical point theory, periodic and homoclinic solutions
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Abstract:
We study the existence of periodic and homoclinic solutions for a class of non-autonomous second order advanced-delayed differential equations of the type

We prove, under some growth conditions on the non-linearities, the existence of non-constant periodic solutions with period any given positive integer. Using very simple arguments, the existence of a non-trivial homoclinic solution is also established. This homoclinic is obtained as the limit of subharmonics. An application to the existence of periodic and homoclinic travelling waves in an infinite lattice of partciles with N-nearest-neighbour interaction and on-site potential is given.