On the number of limit cycles for a class of discontinuous quadratic differential systems

On the number of limit cycles for a class of discontinuous quadratic differential systems
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关于一类不连续二次微分系统的极限环数

DOI:
10.1016/j.jmaa.2016.11.033
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发表时间:
2016-09
影响因子:
1.3
通讯作者:
Zhao Yulin
Zhao Yulin
中科院分区:
数学3区
文献类型:
--
作者:
Cen Xiuli;Li Shimin;Zhao Yulin

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研究了一类不连续二次多项式微分系统中二次等距中心xstec =− y+163x2 − 43y2,ystec = x+83xy的周期轨道在扰动下,用一阶平均法分叉出极限环的最大个数.切比雪夫准则被用来表明,这个最大数是5,可以实现。在某种意义上,本文的结果与文[6]的结果也回答了文[9]的问题。
The present paper is devoted to the study of the maximum number of limit cycles bifurcated from the periodic orbits of the quadratic isochronous center x˙=− y+ 16 3 x 2− 4 3 y 2, y˙= x+ 8 3 x y by the averaging method of first order, when it is perturbed inside a class of discontinuous quadratic polynomial differential systems. The Chebyshev criterion is used to show that this maximum number is 5 and can be realizable. In some sense, the result and that in paper [6] also answer the questions left in the paper [9].
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