走向现代数学学术报告 – 董广峰副教授(No. 987)
报告题目:Some results on isochronous centers of complex Hamiltonian differential systems
报 告 人:董广峰 副教授(暨南大学)
邀 请 人:李健 教授
报告时间:2026年10月28日 16点
报告地点:东海岸校区D324
报告摘要:In this talk, I will introduce a topological approach for studying complex Hamiltonian vector fields on the 2D complex plane. I will then apply this approach to establish a complete solution to the isochronous center problem for systems with only homogeneous nonlinearities. For general isochronous Hamiltonian systems, I will show that the period 1-form, when restricted to the compact Riemann surface of a generic level curve, is not holomorphic. This leads to a concise yet practical necessary condition for isochronicity.
报告人简介:董广峰,博士毕业于北京大学数学科学学院,现为暨南大学数学学院副教授。主要从事常微分方程定性理论的研究,在复域方程的中心问题、分片实系统与全纯系统的中心问题等方面发表论文多篇。