报告题目：Variational nature of Keplerian orbits
报 告 人：陈国璋教授 台湾清华大学
报告时间：2019年9月11日 10:00 - 11:00
报告地点：数学楼第二报告厅
报告摘要:
Keplerian orbits can be characterized as minimizers of some action functional on function spaces with natural topological or boundary constraints. This fact is useful in variational construction of periodic orbits for the n-body and n-center problems. The elliptic case, settled by W. Gordon in 1977, is considerably well-known. Parabolic case is less well-known, and hyperbolic case is virtually unknown. In this talk I will briefly outline those known facts, and describe my proof for the minimizing property of hyperbolic orbits.
报告人简介：
陈国璋 (Chen, Kuo-Chang)，台湾清华大学数学系教授，曾任台湾清华大学数学系主任。研究领域为动力系统，天体力学及微分方程。研究成果在Annals of Math等顶级数学期刊上发表，获得多项学术荣誉及奖励。现担任学术期刊Nonlinearity及Discrete and Continuous Dynamical Systems–Series A 编委。
