报告人：孙春友 教授（兰州大学）

报告题目：Dynamics for a wave equation with sign changing damping

报告摘要：We consider the long-time dynamics generated by weakly damped wave equations in bounded 3D domains where the damping exponent depends explicitly on time and may change sign. It is shown that in the case when the non-linearity is superlinear, the considered equation remains dissipative if the weighted mean value of the dissipation rate remains positive and that the conditions of this type are not sufficient in the linear case.

报告人简介：孙春友，兰州大学教授，博士生导师。主要从事非线性分析和无穷维动力系统的研究，特别是无穷维动力系统吸引子的存在性、维数估计、吸引速度估计、渐近正则性、有限维降维、时空复杂性等。截止目前，发表学术论文40余篇，多篇论文发表在研究领域的主要期刊上，如Transaction Amer. Math. Soc., J. Differential Equations, SIAM J.Applied Dynamical Systems, Proceedings Royal Society Edinburgh, J. Evolutionary Equations, Nonlinearity等。

报告时间：2019年11月22日（星期五） 上午10：00-12：00

报告地点：科技楼南楼702