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25

2020-12

Zeta 函数和Riemman 假设

报告人：范大山 University of Wisconsin-MilwaukeeAbstract: 关于 Zeta 函数的非平凡的零点分布的 Riemman 假设是数学史上最伟大的猜想之一，也是跨越3个世纪至今没有解决的数学难题。在这个数学的科普报告中我们给大家简单介绍 Zata 函数的定义以及它的平凡零点的分布。报告时间： 2020年12月25日8:30-9:30报告地点：腾讯会议：会议 ID：144 125 406 联系人：王梦mathdreamcn@zju.edu.cn

24

2020-12

Four-dimensional steady gradient Ricci solitons

报告人：邓宇星时间：12月24日（周四） 15：30-16：30地点：工商楼 200-9摘要：In this talk, we will talk about some recent progress on 4 dimensional noncollapsed steady gradient Ricci solitons. In particular, We will classify the asymptotic geometry of 4D noncollapsed steady GRS whose Ricci curvature is nonegative outside a compact set. As an application, We will show that such steady Kahler Ri...

24

2020-12

Geometry&Analysis| Mean curvature flow with Type-II curvature blow up

报告人：吴昊天 (悉尼大学)报告时间：2020年12月24日（周四）下午2:30-4:30报告地点：腾讯会议ID：248 180 972；无密码链接：https://meeting.tencent.com/s/c1ixUuIEoRyp报告摘要: Mean curvature flow deforms a hypersurface in a given ambient space in the direction of its mean curvature vectors. In this talk, we present some results on mean curv...

22

2020-12

Minicourse on K-stability K-stability

讲座人：刘雨晨（耶鲁大学）简介： In this minicourse, I will introduce the recent developments in the algebro-geometric theory of K-stability. Specifically, I will discuss Fujita-Li's valuative criteria, openness of K-semistability, optimal destabilization theory for Fano varieties, and K-moduli spaces of Fano varieties. The main reference is K-stability of Fano varieties: an algebro-geo...

17

2020-12

Unsupervised Document Classification integrating Web Scraping, One-Class SVM and LDA Topic Modelling

17

2020-12

Multiplicity one for min-max theory in compact manifolds with boundary and its applications

报告人: 王志超 (多伦多大学)时间: 9:30am—10:30am, December 21, 2020 线上报告：腾讯会议ID: 723834103, 无密码摘要: In this talk, we introduce the multiplicity one theorem for min-max free boundary minimal hypersurfaces in compact manifolds with boundary of dimension between 3 and 7 for generic metrics. To approach this, we developed the min-max theory for free b...

15

2020-12

Microscopic conservation laws for the derivative nonlinear Schr\{o}dinger equation

报告人：徐桂香教授（北京师范大学）时间：2020年12月23日（星期三）上午10:30-11:30地点：腾讯会议：256282696 https://meeting.tencent.com/s/lAOuQZhWbYE0 欧阳楼314摘要：Using the perturbation determinant introduced by B. Simon, we show the microscopic conservation laws for the Schwartz solutions of the derivative nonlinear Schrodinger equation (DNLS) ...

14

2020-12

数学所讲座| q-Deformation of quadratic differentials for Calabi-Yau-X categories

报告人：邱宇教授（清华大学丘成桐数学中心）时间： 2020年12月21日上午10:30-11:30地点：浙江大学玉泉校区欧阳楼316摘要： We introduce q-deformations of categories, stability conditions and quadratic differentials, which relates previous works of Bridgeland-Smith and Haiden-Kazarkov-Kontsevich. This is a joint work with Ikeda and Zhou.联系人：李方fangli@zju.edu.cn，于飞 yufe...

14

2020-12

丛代数与表示论系列学术报告| A geometric model for the module category of a gentle algebra, upper 丛代数和多项式的不可约性

报告人：曹培根博士（法国巴黎大学）地点：浙江大学玉泉校区工商楼200-9报告厅报告1题目: A geometric model for the module category of a gentle algebra摘要: In this talk, we will give a survey on the geometric model for the module category of a gentle algebra. Gentle algebras are realised as tiling algebras, which areassociated to partial triangulations of unpunctured surfaces with...

10

2020-12

Sharp interface limit for Navier-Stokes/Allen-Cahn system

报告人：费明稳（安徽师范大学）时间：2020年12月12日（周六）10:00地点：玉泉校区工商楼200-9摘要: We consider the limiting behavior of solutions to a coupled Navier-Stokes/Allen-Cahn system when a parameter corresponding to the thickness of the diffuse interface tends to zero. To this end we construct a suitable approximation of the solutions and then estimate the difference between the exact and the ...

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