报告人：张伟年教授

题目：Advances on Linearization

摘要：In this talk we introduce some advances on sharp conditions for C^1 linearization of planar hyperbolic diffeomorphisms, conditions of gaps and bands for C^1 linearization of hyperbolic diffeomorphisms in Banach space and conditions on differentiable linearization. Moreover, result on Hölder linearization are introduced in some resonant cases.

报告人：唐三一教授

题目：COVID-19疫情反复暴发的动力学机制与数据分析

摘要：报告旨在介绍如何基于SEIR传染病动力学模型，构建新颖的演化方程来融合干预措施和疫苗接种以及民众行为改变的动态过程。发展方法计算最优的干预强度和疫苗接种速率使得易感人群规模低于其阈值，从而避免疫情的反复暴发。主要结果揭示了干预措施的强弱与解除、民众行为对疫情的响应切换、疫苗接种率和时效性、外界诱因和COVID-19传播强度等因素诱导了疫情多次暴发。最后使用不同地区的疫情数据分析模型的可行性。

报告人：范猛教授

题目：Basic Theory of Generalized P-RFDEs

摘要：A new class of RFDEs with unbounded delay and with finite memory is introduced. The basic theories of existence, uniqueness, continuation, and continuous dependence are developed.

时间：2021年5月16日13:30-17:30

地点：理学楼401