应数学系付永强教授邀请，美国犹他州立大学教授、天津大学应用数学中心教授王志强教授将于2019年1月6日至1月8日来访我校并做报告，以下是报告信息，欢迎感兴趣的师生参加。

报告题目：Concentration of nodal solutions for semiclassical NLS 

时间: 2019.01.08, 10:00-12:00

地点：格物楼503室

报告摘要：We discuss the existence of localized sign-changing solutions for the semiclassical nonlinear Schrödinger equation. When $V$ has a local minimum point $P$, as $\epsilon \to 0$, we construct an infinite sequence of localized sign-changing solutions clustered at $P$ and these solutions are of higher topological type. Our method is rather robust without using any non-degeneracy condition.