【廿周年院庆学术报告85】 · 【和山数学论坛第371期】
一、报告题目:Limit cycles near homoclinic and heteroclinic loops by high-order analysis
二、报告人:田云教授
三、时间:2023年6月10日(周六)上午:10:00-10:40
四、地点:闻理园A4-218
报告摘要:In this talk, we use (high-order) Melnikov functions to study bifurcations of limit cycles around homoclinic and heteroclinic loops in near-Hamiltonian systems with small perturbations. An algorithm is constructed for the computation of the coefficients of the corresponding expansion of the first order Melnikov functions. New lower bounds are obtained for the number of limit cycles produced around homolinic and heterclinic loops in planar cubic systems.
报告人简介:田云,加拿大西安大略大学应用数学博士,现为上海师范大学数理学院教授,博士生导师,主要从事微分方程定性理论、计算机符号计算和传染病模型等方向的研究,特别关注弱化的Hilbert第16问题、同宿异宿极限环分支和规范型的符号计算等相关问题。近年来,在JDE、Commun. Nonl. Sci. Numer. Simul和Nonlinear Anal. RWA等本领域主流期刊发表学术三十余篇论文。
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