任意自由度和常双曲不变圆柱中的Arnold扩散
Arnold diffusion in arbitrary degrees of freedom and normally hyperbolic invariant cylinders
摘要:
我们证明了Arnold扩散的先验稳定的情况下的一种形式。设H 0(p)+ $ε$ H 1($θ$,p,t),$θ$ $\in$ Tn,p $\in$ Bn,t $\in$ T = R/T是一个具有严格凸H 0的任意自由度n2的近可积系统.我们证明了对于“一般的”$ε$ H1,存在一个轨道($θ$,p)(t)满足p(t)-- p(0){ \textgreater } l(H1){ \textgreater } 0,其中l(H1)与$ε$无关.扩散轨道沿着余维1共振行进,并且我们构造的唯一障碍是附加共振的有限集。对于证明,我们使用的组合几何和变分方法,并设法适应工具,最近开发的先验不稳定的情况下。
英文摘要:
We prove a form of Arnold diffusion in the a priori stable case. Let H0(p) + $ε$H1($θ$, p, t), $θ$ $\in$ T n , p $\in$ B n , t $\in$ T = R/T be a nearly integrable system of arbitrary degrees of freedom n 2 with a strictly convex H0. We show that for a "generic" $ε$H1, there exists an orbit ($θ$, p)(t) satisfying p(t) -- p(0) {\textgreater} l(H1) {\textgreater} 0, where l(H1) is independent of $ε$. The diffusion orbit travels along a co-dimension one resonance , and the only obstruction to our construction is a finite set of additional resonances. For the proof we use a combination geometric and variational methods, and manage to adapt tools which have recently been developed in the a priori unstable case.
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