九章讲堂第50讲(主讲嘉宾:黄昊旻副教授(中国地质大学(武汉))

作者: 时间:2023-03-29 点击数:

讲座题目: A Hamilton-Jacobi approach for asymptotic propagation speed of a field-road model with Wentzell-type boundary conditions

讲座摘要: We investigate the asymptotic propagation speed of a Fisher-KPP equation on the plane with a Wentzell-type boundary condition imposed on the x-axis, which arises in a field-road model. We utilize the theory of viscosity solutions for Hamilton-Jacobi equations to study the asymptotic expansion shape. With the aid of proper rescaling and WKB ansatz, a so-called phase function determines the asymptotic expansion shape. We prove that the phase function is the viscosity solution of a Hamilton-Jacobi variational inequality and can be identified by a value function of an optimal control problem. By solving this optimal control problem, we obtain the exact phase function formula and characterize the asymptotic expansion shape. This talk is based on a joint work with Prof. Linlin Su(Southern University of Science and Technology) .

讲座时间:2023年330日(周下午15:00

讲座方式:线上开展(腾讯会议,会议号:429 949 694)

嘉宾简介黄昊旻,2019年01月获哈尔滨工业大学数学专业博士学位,2014年10月至2016年10月,在俄亥俄州立大学联合培养。2019年4月至2021年11月,在南方科技大学/武汉大学从事博士后工作。2022年10月加入中国地质大学(武汉)。主要致力于非线性抛物/椭圆型偏微分方程和生物数学方面的研究, 科研方向是疾病和种群在空间中的传播现象。

 

 

 

 

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