主讲人：沈建和 福建师范大学教授

时间：2022年6月6日14：00

地点：腾讯会议 220 119 748

举办单位：数理学院

主讲人介绍：沈建和，教授、博士生导师，目前就职于福建师范大学数学与统计学院；兼任美国《数学评论》和德国《数学文摘》评论员、中国数学会奇异摄动专业委员会副主任委员等；研究方向为奇异摄动理论及应用；已在《Philosophical Transactions of the Royal Society A》《Physica D: Nonlinear Phenomenon》《Journal of Dynamics and Differential Equations》《Discrete and Continuous Dynamical Systems》《Discrete and Continuous Dynamical Systems-B》等杂志发表论文约 30 篇；（曾）主持国家自然科学基金面上项目和青年项目、中国博士后科学基金、福建省自然科学基金面上项目等。

内容介绍：In this talk we will introduce the birth of periodic solutions and some associated bifurcation mechamisms in singular perturbation systems.Based on geometric singular perturbation theory (GSPT) and bifurcation theory, a variety of rich and interesting dynamics, including the birth of relaxation oscillations, mixed-mode oscillations (MMOs), canard explosion and bistability can be observed in singular perturbation systems with two or three-timescale.