学术活动

当前位置:首页>>学术交流>>学术活动

Cyclicity of periodic annulus and Hopf cyclicity in perturbing a hyper-elliptic Hamiltonian system

主 讲 人 :孙宪波     教授

活动时间:12月01日15时30分    

地      点 :腾讯会议 242-606-812

讲座内容:

We study the cyclicity of periodic annulus and Hopf cyclicity in perturbing a quintic Hamiltonian system. The undamped system is hyper-elliptic, non-symmetric with a degenerate heteroclinic loop, which connects a hyperbolic saddle to a nilpotent saddle. We rigorously prove that the cyclicity is 3 for periodic annulus when the weak damping term has the same degree as that of the associated Hamiltonian system.


主讲人介绍:

孙宪波,杭州师范大学数学学院教授,博士生导师。研究方向为微分方程定性理论,在中国科学,DCDS B,JDE,JSC,BSM等知名期刊发表学术论文三十余篇,主持两项国家自然科学基金,多项含广西杰出青年基金在内的省部级项目。