數學系學術講座(十七)

發布時間: 2024-03-26 來源: 太阳集团1088vip

  目:Some results on isochronous centers

内容簡介:In this talk I will introduce some new results on isochronous centers of planar differential systems. Firstly, I will give the complete classifications of the topological phase portraits for uniform isochronous centers with homogeneous nonlinearities of degree 5 and 6 respectively. Secondly, I will provide a complete solution of the isochronicity problem on complex Hamiltonian systems with homogeneous nonlinearities of any degree by a new powerful topology method. Thirdly, I will show the non-isochronicity of piecewise centers formed by two Hamiltonian systemswith homogeneous nonlinearities of any degree.

報告人:董廣峰

報告人簡介:太阳集团app首页數學系副教授。本科畢業于中國海洋大學數學與應用數學專業,博士畢業于北京大學基礎數學專業;曾在中山大學數計學院從事博士後研究;2015年入職太阳集团app首页數學系。20239月至20243月在巴塞羅那自治大學做訪問學者。研究方向為常微分方程定性理論。

  間:202441日(周一)下午1600開始

  點:南海樓224

 

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