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18

2025-04

School Colloquium——二步Carnot群上距离初探

21

2025-04

几何与拓扑讨论班——Real Bott periodicity at higher chromatic heights

报告人：Guchuan Li，Peking UniversityPretalk主题：Bott Periodicity and topological K-theory时间：2025年4月21日，16:15-16:45摘要：We will assume Bott Periodicity and use it to define a generalized cohomology theory: topological K-theory.Research Talk主题：Real Bott periodicity at higher chromatic heights时间：2025年4月21日，16:45-17:35摘要：Real Bott periodicity shows that the homotopy groups of Re...

22

2025-04

Some applications of Calabi-Yau algebra/category

21

2025-04

组合数学讨论班——Burness-Giudici's Conjecture on Bases of Primitive Groups

报告人：杜少飞，首都师范大学时间：2025年4月21日，10:00-11:00地点：海纳苑2幢814摘要：Let G be a permutation group on a set Omega. A subset of O is a base for G if its pointwise stabilizer in G is trivial. By b(G) we denote the size of the smallest base of G. Clearly, every permutation group with b(G)=2 contains some regular suborbits. Let Gamma be the union of all regu...

18

2025-04

几何与拓扑讨论班——Extremals in log-concavity: an algebro-geometric viewpoint

报告人：Jian Xiao，Tsinghua UniversityPretalk主题：Examples on log-concavity时间：2025年4月18日，16:15-16:45摘要：We present several examples on log-concavity in geometry and combinatorics, behind which is the Hodge index theorem.Research Talk主题：Extremals in log-concavity: an algebro-geometric viewpoint时间：2025年4月18日，16:45-17:35摘要：We show how to formulate the extremal problem in log-co...

16

2025-04

计算与应用讨论班——Topology-enhanced machine learning for consonant recognition

报告人：朱一飞（南方科技大学）时间：2025年4月16日，15:30-16:30地点：海纳苑2幢203室摘要：In artificial-intelligence-aided signal processing, existing deep learning models often exhibit a black-box structure. The integration of topological methods serves the dual purpose of extracting structural information from time-dependent data as well as making models more interpretable. In this tal...

14

2025-04

几何与拓扑讨论班——Spheres, spectral algebraic geometry, and Jacquet–Langlands correspondence

报告人：Yifei Zhu，Southern University of Science and TechnologyPretalk主题：Quantum materials, Higgs bundles, and geometric Langlands correspondence时间：2025年4月14日，16:15-16:45摘要：With motivation from condensed matter physics and materials science in collaboration with physicists, I’ll discuss explicit examples of eigenbundles associated to both gapped and gapless quantum mechanical system...

11

2025-04

Distinguished Lecture——复几何的一些进展

16

2025-04

分析和微分方程讨论班——ON THE REGULARITY OF THE SOLUTION OF SOME NONLINEAR PROBLEMS

报告人：Michel Marie Chipot（瑞士苏黎世大学）时间：2025年4月16日，11:00-12:00地点：海纳苑2幢106摘要：The goal of this talk is to present regularity results regarding problems of the type −∆u + β(u − ϕ) = 0 in Ω, u = 0 on ∂Ω which depend only on ϕ and not on the monotone function β. This uses nice techniques developed by H. Brezis and collaborators. (Joint work with David Kinderlehrer)报告人简介...

15

2025-04

量子计算讨论班——Demonstrating 88Sr+ Ion-Photon Entanglement at Near-Telecom Wavelengths

报告人：谢远衡（杜克大学）时间：2025年4月15日，19:00-21:00地点：海纳2幢105室摘要：The strontium ion is a promising candidate for medium-distance quantum networking due to its atomic transition at 1092 nm. This transition could align well with pre-existing fiber optic infrastructure, depending on the specific communication mode and fiber loss characteristics. Thus, lossy photon conversion processes...

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