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14

2024-10

组合数学和代数编码讲座—— Covers of the Integers by Residue Classes and their Extensions to Groups

报告人：孙智伟教授（南京大学）报告时间：2024年10月18日周五下午3:00-4:00报告地点：海纳苑2幢820摘要：A system A={a_s+n_sZ: s=1,2,...,k} of k residue classes is called a cover of Z if any integer belongs to one of the k residue classes. This concept was introduced by P. Erdos in the 1950s. Erdos ever conjectured that A is a cover of Z whenever it covers 1,...,2^k. In this talk we introduce s...

14

2024-10

组合数学和代数编码讲座—— Decoding algorithm of twisted GRS codes and twisted Goppa codes

报告人：岳勤教授报告时间：2024年10月18日周五下午2:00-3:00报告地点：海纳苑2幢820摘要： In this talk, we use extended Euclid's algorithm to support new decoding algorithms for two classes of maximum distance separable (MDS) twisted generalized Reed-Solomon (TGRS) codes of parameters [n, n-t, t+1 ] over F_q. For t even, they can correct t/2 errors with time complexity O(qn). Moreover, we...

14

2024-10

辛拓扑与物理讨论班——Operadic Structures in Floer theory

报告人：Mohammed Abouzaid，（Stanford University）时间：2024年10月18日（周五）10:30-11：30地点：海纳苑2幢206摘要：Floer homology groups carry a wealth of operations coming from moduli spaces of pseudo-holomorphic curves. These operations lift to the chain level, but except for the case of discs, it is difficult to write formulae for all of them. I will explain recent work with Groman and Varolgune...

11

2024-10

Distinguished Lecture——Morse theory at 100 years

07

2024-10

Distinguished Lecture——A new algorithm for machine learning and artificial intelligence

07

2024-10

School Colloquium——Poisson structures and cluster algebras

07

2024-10

代数与表示论特邀报告——Modular Poisson varieties and its symplectic foliations

30

2024-09

代数与表示论特邀报告——Infinite rank cluster algebras arising from double Bott-Samelson cells

24

2024-09

浙大-西湖几何分析讨论班——A class of projectively flat Finsler metrics

报告人：莫小欢教授（北京大学）时间：2024年10月17日（周四）16：00-17:00地点：海纳苑2幢106摘要：Projectively flat Finlser metrics on a convex domain ${U}$ in $\mathbb{R}^n$ are regular solutions to Hilbert's Fourth Problem. In this lecture, we discuss projectively flat Finlser metrics on ${U}$. We find equations that characterize these metrics with weakly orthogonal inv...

23

2024-09

动力系统与分形几何讨论班——Lp estimates of orthogonal projections, dual Furstenberg problem, and discretized sum-product

报告人：刘博辰（南方科技大学）报告时间：9月27日下午3点30分—4点30分报告地点：腾讯会议（会议号：381-841-791；会议密码：240925）报告摘要: L2 estimates of orthogonal projections are classical in geometric measure theory. In this talk we shall discuss about recent progress on Lp estimates. Then we come up with a dual version of the Furstenberg problem and introduce some partial results. We also find th...

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