数学科学学院学术报告Constructions of expander graphs and surfaces沈洋(复旦大学)时间:2025-11-04 16:00—17:00(周二下午)地点:沙河主楼E402 摘要:In this talk, we will review some relative results of spectrums on graphs and hyperbolic surfaces, and introduce a new model of random graphs. Based on the study of such model, we constructed a sequence of non-compact hyperbolic surfaces with unifor...
数学科学学院学术报告 Optimization flows landing on the Stiefel manifold 高斌(中国科学院数学与系统科学研究院) 报告时间:2025年11月4日 星期二 上午10:30-11:30报告地点:沙河校区E806报告摘要:We study a continuous-time system that solves optimization problems over the set of orthonormal matrices, which is also known as the Stiefel manifold. The resulting optimization flow follows a path that is ...
数学科学学院短期课程Almost mathematics in log-perfectoid toric mirror symmetry张秉宇(南丹麦大学)时间:2025.11.04-11.18 14:00—15:00(每周二下午)地点:腾讯会议:686-9079-9616(密码:1024)摘要:In these lectures, I will explain a version of toric mirror symmetry equivalence proposed by D. Vaintrob that relates the category of all topological sheaves and the category of almost quasi-coherent ...
数学科学学院学术报告Some results on ground states of nonlinear Dirac equations郭琪(中国人民大学)时间:2025-11-04 15:00—16:00(周二下午)地点:沙河主楼E402 摘要:In this talk, I will begin with a brief review of physical and geometric background of the Dirac operator, along with the spectral structure and orthogonal decomposition. Then I will introduce the definitions of action and energy ...
基础数学科研教学交流论坛方程教学中的思考与实践保继光 教授(北京师范大学)时间:2025年10月22日(周三)下午16:00-17:00 地点:沙河主楼E806摘要: 将介绍在微分方程教学中实践课程思政、培养数学思维、科研融入教学、固化教学成果、科研促进教学等方面的情况。 报告人简介: 保继光,北京师范大学二级教授、博士生导师,研究方向为偏微分方程和数学教育。曾获得国务院政府特殊津贴、国家优秀教学成果二等奖、教育部自然科学...
数学科学学院学术报告--- 分析、偏微分方程与动力系统讨论班(2025秋季第11讲)The global solvability and asymptotic behavior for doubly degenerate nutrient mode吴端(德国帕德博恩大学)时间:2025年10月21日(周二)下午16:00-17:00 地点: 腾讯会议:451-425-961 会议密码:251021 https://meeting.tencent.com/dm/CkyPngdzjKdb摘要: In this talk, we focus on the doubly degenerate nutrient model under no-fl...