Heteroclinic Orbits for a Discrete Pendulum Equation

Details Heteroclinic Orbits for a Discrete Pendulum Equation Heteroclinic Orbits for a Discrete Pendulum Equation

2010-12-22

arxiv.org/abs/1012.5012v2

Mathematics

Dynamical Systems

Scientific paper

About twenty years ago, Rabinowitz showed firstly that there exist heteroclinic orbits of autonomous Hamiltonian system joining two equilibria. A special case of autonomous Hamiltonian system is the classical pendulum equation. The phase plane analysis of pendulum equation shows the existence of heteroclinic orbits joining two equilibria, which coincide with the result of Rabinowitz. However, the phase plane of discrete pendulum equation is similar to that of the classical pendulum equation, which suggests the existence of heteroclinic orbits for discrete pendulum equation also. By using variational method and delicate analysis technique, we show that there indeed exist heteroclinic orbits of discrete pendulum equation joining every two adjacent points of $\{2k\pi+\pi: k\in{\mathbb Z}\}$.

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