主题: Equivalence of the Melnikov function method and the averaging method主讲人: 韩茂安（Maoan Han） 教授地点: 松江校区2号学院楼331会议室时间: 2016-05-05 15:40:00组织单位: 理学院
主讲人简介：Shanghai Normal University Professor, National Important Contribution Mid-Aged Expert.
报告摘要：This topic concerns about the equivalence between the Melnikov method and the averaging method for studying the number of limit cycles, which are bifurcated from the period annulus of planar analytic differential systems. We prove that for any positive integer k, the kth Melnikov function is equal to the kth averaging function with a multiplication modulo both Melnikov and averaging functions of order less than k, which appear in planar analytic near–Hamiltonian systems.
讲座语言：英语