arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.11352math.DS
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具有非线性开关曲线的平面分段线性向量场的高阶Melnikov分析

Higher order Melnikov analysis for planar piecewise linear vector fields with nonlinear switching curve

Kamila da S. Andrade, Oscar A. R. Cespedes, Dayane R. Cruz, Douglas D. Novaes

摘要:

本文主要研究了具有两个由曲线$y=x^n$分隔的区域的平面分段线性微分系统的极限环$H(n)$的最大个数的下界估计,其中$n$是正整数.为此,我们进行了高阶Melnikov分析的线性中心的分段线性扰动。特别地,我们得到了对于$n\geq 4$偶数的$H(2)\geq 4,$ $H(3)\geq 8,$ $H(n)\geq7,$和对于$n\geq 5$奇数的$H(n)\geq 9,$。本文的分析主要是基于Chebyshev系统的正精度和Melnikov理论的一些最新结果,这些结果将在任意阶下推广到一类具有非线性切换流形的非光滑微分系统。

英文摘要:

In this paper, we are interested in providing lower estimations for the maximum number of limit cycles $H(n)$ that planar piecewise linear differential systems with two zones separated by the curve $y=x^n$ can have, where $n$ is a positive integer. For this, we perform a higher order Melnikov analysis for piecewise linear perturbations of the linear center. In particular, we obtain that $H(2)\geq 4,$ $H(3)\geq 8,$ $H(n)\geq7,$ for $n\geq 4$ even, and $H(n)\geq 9,$ for $n\geq 5$ odd. This improves all the previous results for $n\geq2.$ Our analysis is mainly based on some recent results about Chebyshev systems with positive accuracy and Melnikov theory, which will be developed at any order for a class of nonsmooth differential systems with nonlinear switching manifold.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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