学术报告
A Hamilton-Jacobi Approach for Asymptotic Propagation Speed of a Field-road Model with Wentzell-type BC
题目:A Hamilton-Jacobi Approach for Asymptotic Propagation
Speed of a Field-road Model with Wentzell-type BC
报告人:黄昊旻 副教授 中国地质大学(武汉)
摘 要 : In these two lectures, we examine the asymptotic propagation speed of the Fisher-KPP equation on the plane with a Wentzell-type boundary condition along the x-axis, originating from a field-road model. This problem has been recently investigated by Chen, He, and Wang [2023, ARMA]. Diverging from their approach, which primarily employed fundamental solutions, we utilize the theory of viscosity solutions for Hamilton-Jacobi equations to analyze the asymptotic expansion shape. By applying appropriate rescaling and the WKB ansatz, we identify a phase function that dictates the asymptotic expansion shape. We demonstrate that this phase function is the viscosity solution to a Hamilton-Jacobi variational inequality and can be characterized through a value function of an optimal control problem. Solving this optimal control problem, we derive the exact formula for the phase function, thereby characterizing the asymptotic expansion shape.
报告时间:
讲座 1 :2024 年 7 月 1 日(周一)15:00-17:00
讲座 2 :2024 年 7 月 3 日(周三)15:00-17:00
报告地点:教二楼 610
联系人:吴雅萍