学术沙龙—分析与方程专题报告II

发布者:系统管理员发布时间:2017-10-31浏览次数:115

人:熊艳琴博士

 

:  鲁世平教授

 

报告时间:2017111 13:30-14:30

 

报告地点:尚贤楼108报告厅

 

报告题目:The number of limit cycles of a perturbed polynomial systems with multiple circles of critical points

 

报告摘要:In this talk, we investigate the problem for limit cycle bifurcations of system $/dot{x}=yF(x,y)+/varepsilon p(x,y),~/dot{y}=-xF(x,y)+/varepsilon q(x,y)$, where $F(x,y)$ consists of multiple circles and $p(x,y),q(x,y)$ are polynomials of degree $n$.  The upper bound for the maximal number of limit cycles emerging from the period annulus surrounding the origin is provided in terms of $n$ and the involved multiplicities of circles by using the first order Melnikov function. Furthermore, Hopf bifurcation for a cubic system of this type is discussed.

 

报告人简介:熊艳琴,女,师从著名方程学家上海师范大学韩茂安教授获博士学位。在微分方程主流SCI杂志Journal of Differential Equations等发表论文18篇。于20166月入职南京信息工程大学数学与统计学院。入职以来,获得国家自然科学青年基金、江苏省青年科学基金,江苏省省高校面上项目资助。

 

欢迎参加!

 

数学与统计学院

 

20171031