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微分几何讨论班（2025春第3讲）题目：Spectral comparison results for the N-Bakry-Emery Ricci tensor报告人：郝子航 （北京大学）时间：2025年2月20日 11:10-12:00地点：沙河主E404摘要：In this talk, we will first introduce the concept of weighted manifold M with spectral N-Bakry-Emery Ricci tensor bounded from below. Then we will prove a diameter estimate and a global weighted volume estimate for M. Th...
北航数学论坛学术报告 --微分几何讨论班（2025春第2讲）题目：gap theorem on manifolds using Ricci flow报告人：李文俊 教授（香港中文大学）时间：2025年2月20日 10:15-11:05地点：沙河主E404摘要：In Kahler geometry, it was proved by Ni that curvature on nonflat Kahler manifold with nonnegative bisectional curvature cannot decay too fast at infinity. In this talk, we will discuss how Ricci flow can be us...
北航数学论坛学术报告 --微分几何讨论班（2025春第1讲）题目：On Kahler manifolds with non-negative mixed curvature报告人：楚健春 教授（北京大学）时间：2025年2月20日 9:20-10:10地点：沙河主E404摘要：The mixed curvature comes from a linear combination of the Ricci and holomorphic sectional curvature. In this talk, we will first survey recent progress. Then we discuss a structure theorem for compact K...
学术报告 Accelerated Decentralized Gradient Method Over Unbalanced Directed Graphs严明（香港中文大学（深圳））报告时间：2025年1月17日星期五 10：30-11：30 报告地点：沙河主楼E404报告摘要: We consider the decentralized optimization problem, where a network of n agents aims to collaboratively minimize the average of their individual smooth and convex objective functions through peer-to-peer commun...
北航数学论坛Whitham modulation theory and the classification of solutions of the Riemann problem for the Fokas-Lenells equation田守富 教授报告时间：2025年01月07日（星期二）晚上7：00--8：00报告地点：腾讯会议：709-765-033报告摘要：In this work, we explore the Riemann problem of the Fokas-Lenells equation given initial data in the form of a step discontinuity by employing the Whitham modulation th...
应用数学系学术报告--- 分析、偏微分方程与动力系统讨论班(2024秋季第15讲)On the Sobolev stability threshold for 3D Navier-Stokes equations with rotation near the Couette flow 许孝精 (北京师范大学) 时间：2025年1月10日(周五)下午 15:00-16:00 地点：沙河主楼E602摘要: In this talk, we investigate the dynamic stability of periodic, plane Couette flow in the three-dimensional Navier-Stokes equations with ...
