报告人：周展教授，广州大学

题目：Ground state solutions for some discrete nonlinear Schrödinger equations

摘要：In this talk, we study the existence of ground state solutions for some discrete nonlinear Schrödinger equations with a sign-changing potential V that converges at infinity and a nonlinear term being asymptotically linear at infinity. The resulting problem engages two major difficulties: one is that the associated functional is strongly indefinite and the other is that, due to the convergency of V at infinity, the classical methods such as periodic translation technique and compact inclusion method cannot be employed directly to deal with the lack of compactness of the Cerami sequence. New techniques are developed in this work to overcome these two major difficulties. This enables us to establish the existence of a ground state solution and derive a necessary and sufficient condition for a special case. To the best of our knowledge, this is the first attempt in the literature on the existence of a ground state solution for the strongly indefinite problem under no periodicity condition on the bounded potential and the nonlinear term being asymptotically linear at infinity. This is a joint work with Professor Jianshe Yu and Dr. Genghong Lin.

时间：2021年5月19日19:30-21:30

地点：腾讯会议，会议ID：459 584 836

https://meeting.tencent.com/s/Xe5Puzf6ugBB