講題：First eigenvalue estimates in pseudo-hermitian geometry演講者：國立屏東大學應用數學系 吳進通教授時間：110/05/05(三)下午2:00~3:00地點：府城校區 格致樓C305室摘要：In this talk, I will talk about how to get a sharp lower bound estimate for the first nonzero eigenvalue of the sub-Laplacian, Kohn Laplacian, Folland-Stein operator, weighted sub-Laplacian and weighted Kohn Laplacian on a closed strictly pseudo-convex CR (2n+1)-manifold. We also discuss the case when a sharp lower bound estimate of the sub-Laplacian, Kohn Laplacian, weighted sub-Laplacian or weighted Kohn Laplacian is achieved. It can be showed that such a manifold is the standard CR (2n+1)-sphere.此活動可登錄通識護照乙場次歡迎全校師生踴躍參加！#參加演講請務必配戴口罩 ，若醫療口罩用完，請配戴其他材質的口罩 ，包括布口罩。防疫期間感謝大家的配合！