关于举行何清友博士(法国索邦大学)学术报告会的通知

报告主题: Some sharp geometric properties of two related reaction-diffusion type free boundary problems

报 告 人: 何清友  博士(法国索邦大学)

报告时间：2026年 6月22日（星期一）下午16:30-17:30

报告地点：37号楼3A01

报告摘要：

The porous medium equation and the Hele-Shaw problem are two classical diffusive mechanisms related to the free boundary problems, which are connected by the incompressible limit. Taking the additional reaction terms into consideration, this is the so-called the reaction-diffusion equation, where the free boundary is referred to the support boundary. In this talk, I will present the sharp Lipschitz continuity for porous medium type reaction-diffusion equation and sharp power concavities for the two free boundary problems. The interest is that we can see some geometric differences for the two retaled free boundary problems.

报告人介绍：

何清友博士毕业于首都师范大学，现在法国索邦大学做博士后。从事趋化模型的不可压缩极限，反应扩散型自由边界问题的正则性，以及神经元模型的定性行为等方向的PDE研究，完成的工作部分已发表在JFA,SIMA,M3AS等著名期刊上。

   邀 请 人: 洪广益 教授

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数学学院

2026年6月18日