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18

2024-10

代数与表示论系列报告——On a class of noetherian prime Hopf algebra

Speaker: Dr.zahra nazemian (University of Graz, Austria)Time: 4:10-5:10pm, Oct. 21 (Monday), 2024Place: 浙江大学紫金港校区海纳苑二号楼101Abstract: Brown and Goodearl proposed a conjecture stating that every prime noetherian Hopf algebra is Auslander Gorenstein (AG). We prove that if a prime noetherian Hopf $k$-algebra is AG, or more generally, if it possesses an Auslander dualizin...

16

2024-10

计算与应用讨论班——Quasi-entropy

报告人：徐劼（中国科学院计算数学与科学工程计算研究所）时间：2024年10月28日16:00-18:00地点：海纳苑2幢106摘要：Liquid crystals are featured by local anisotropy usually described by angular moment tensors. The free energy of tensors needs a stabilizing entropy term. When non-axisymmetric molecules are involved, two classical approaches to write down an entropy term, quartic polynomial and maximum entr...

16

2024-10

动力系统与分形几何讨论班——Lower Assouad-type dimensions: old and new

报告人：陈海鹏（深圳技术大学）报告时间：10月25日（周五）下午3点30分—4点30分报告地点：数学楼（海纳苑2幢）203室报告摘要: As natural duals to the well-studied Assouad-type dimensions, the lower Assouad-type dimensions form a family of fractal dimensions that describe and quantify the coarse aspects of a set. In this talk, we will review their definitions and properties, and present ong...

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

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

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...

07

2024-10

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

04

2024-10

计算与应用讨论班——Towards an AI Mathematician

报告人：Kaiyu Yang（Meta Fundamental AI Research (FAIR) team）时间：2024年10月4日上午10:00地点：https://meeting.tencent.com/dm/cC3EArPcmTBL #腾讯会议：371-435-370摘要：Mathematics is a hallmark of human intelligence and a long-standing goal of AI. It involves analyzing complex information, identifying patterns, forming conjectures, and performing logical deduction. Many of these capab...

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...

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