报告题目：More singular trajectories coined in a 3D chaotic system with three-scroll attractor
Abstract : In this talk, after revisiting a 3D chaotic system, its more rich hidden dynamics that have not been found previously in the known literature are clearly revealed, mainly for its singular orbits ( such as singular degenerate heteroclinic cycle, heteroclinic orbit,etc) and the dynamics at infinity. Especially, its Hopf bifurcation, zero-Hopf bifurcation and degenerate fold bifurcation, etc,at the origin, are in detail discussed.
Meanwhile, numerical simulations not only support all obtained analytical results,but also further illustrate other new dynamical behaviors, including two heteroclinic orbits and their bifurcated chaotic attractors, infinite many singularly degenerate heteroclinic cycles with two-scroll and three-scroll chaotic attractors near them.
报告人：李先义
报告时间：2019年1月9日上午9：00-10：00
地点：尚贤楼706
报告人简介： 李先义，华东师范大学(本、硕、博)，法国里尔科技大学博士后。
现为浙江科技学院教授,博导,非线性分析研究所所长，浙江省“钱江学者”特聘教授，美国《Mathematical Review》特约评论员，教育部学位与研究生教育发展中心评估处专家。
李先义教授先后任职于南华大学、深圳大学、扬州大学。主要从事常微分方程与动力系统，生物数学，数学建模与仿真等研究。至今已在欧美等著名期刊发表科研论文90余篇，其中被SCI收录50篇，Top期刊4篇；在德国出版专著一部。主持科研项目20余项（国家级4项）；先后被评为 “湖南省新世纪‘121’人才工程”人选、“湖南省学科带头人”、 “广东省‘千百十’人才工程省级培养对象”等。
现任 《Annual Review of Chaos Theory》,《 Bifurcations and Dynamical Systems》，《Probe - Mathematics and Mathematical Sciences》等多个期刊编委。
先后应邀访问法国Haute Alsace大学、德国Ulm大学。
数学与统计学院
2019年1月8日