学术报告

【online】Restricted independence in displacement function

发布人:发布时间: 2020-08-28

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题目:Restricted independence in displacement function

 

时间: 20209915:00 -16:00


报告方式:Zoom APP  会议 ID651 2716 6946密码:562374

 

报告人:张伟年 (四川大学)

摘要:Since the independence of focal values is a sufficient condition to give a number of limit cycles arising from a center-focus equilibrium, in this paper we consider a restricted independence to a parametric curve, which gives a method not only to increase the lower bound for the cyclicity of the center-focus equilibrium but also to be available when those focal values are not independent. We apply the method to a nondegenerate center-focus system and prove that the cyclicity reaches its an upper bound. This is a joint work with Xingwu Chen, Jaume Llibre, Zhaoxia Wang.


邀请人:程伟 老师