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21

2023-06

On Hadwiger’s covering functional for the simplex and cross-polytope

题目：On Hadwiger’s covering functional for the simplex and cross-polytope报告人：连艳陆（杭州师范大学）时间、地点：2023年6月28日10：30-12：30，海纳楼2幢203摘要：In 1957, Hadwiger made a conjecture that every n-dimensional convex body can be covered by 2^n translations of its interior. The Hadwiger's covering functional is the smallest positive number r such that K can be covered by m transla...

20

2023-09

Some new results on repeated patterns in proper edge colorings

题目：Some new results on repeated patterns in proper edge colorings报告人：张韬（之江实验室）时间、地点：2023年6月28日8：30-10：30，海纳楼2幢203摘要：In this talk, we will study a new extremal problem recently posed by Conlon and Tyomkyn [Repeated patterns in proper colourings, SIDMA, 2021]. Given a graph $H$ and an integer $k\geqslant 2$, let $f_{k}(n,H)$ be the smallest number of colors $c$ suc...

21

2023-06

密铺镶嵌领域的一些最新进展

题目：密铺镶嵌领域的一些最新进展报告人：王二小（浙江师范大学，教授）地点：海纳苑2幢205房间报告时间：2023年7月3日9:30-11:30摘要：小众的密铺镶嵌领域在近几年突破频频，美国杂志报导的就有：Mann-Mann-von Derau；Rao：终结平面凸五边形单密铺分类Kedlaya-Kolpakov-Poonen-Rubinstein：分类有理二面角的四面体，推进四面体单密铺空间分类Greenfeld-Tao(陶哲轩)：否定高维的周期性密铺猜想Smith-Myers-Kaplan-Strauss：找到...

20

2023-09

A local twisted trace formula for Whittaker induction of coregular symmetric pairs

数论与表示论讨论班Number Theory and Representation Theory SeminarTime: June 28, Wednesday, 16:00-17:00 Venue: Lecture HallSpeaker:Chen Wan万忱（Rutgers University） Title: A local twisted trace formula for Whittaker induction of coregular symmetric pairsAbstract: In this talk, I will discuss the geometric expansion of a local twisted trace formula for the Whittaker induction of any symmetric pairs...

25

2023-09

Orbifold Hirzebruch-Riemann-Roch

题目: Orbifold Hirzebruch-Riemann-Roch报告人：陈宇航(Ohio State University)时间：2023年6月29日10:00-12:00地点：海纳苑2幢202摘要: 联系人：仲杏慧（zhongxh@zju.edu.cn）

21

2023-09

Sticky Kakeya sets in R^3

Title: Sticky Kakeya sets in R^3Abstract: A Kakeya set is a set of points in R^n which contains a unit line segment in every direction. The Kakeya conjecture states that the dimension of any Kakeya set is n. This conjecture remains wide open for all n \geq 3.Together with Josh Zahl, we study a special collection of the Kakeya sets,namely the sticky Kakeya sets, where the line segmen...

20

2023-09

Zeta Functions of Shimura Varieties: Past, Present, and the Near Future

数论与表示论讨论班Number Theory and Representation Theory SeminarTime: June 21, Wednesday, 16:00-17:00 Venue: Lecture HallSpeaker:Yihang Zhu朱艺航（University of Maryland） Title: Zeta Functions of Shimura Varieties: Past, Present, and the Near FutureAbstract: I will first recall the general expectations of Shimura, Langlands, and Kottwtiz on the shape of the zeta function of a Shimura variety, or...

20

2023-09

Parameter space of cubic polynomials with a parabolic fixed point

Title: Parameter space of cubic polynomials with a parabolic fixed pointAbstract: We study the topological structure of the parameter space for the cubic polynomial family \lambda z+az^2+z^3 when \lambda is a root of unity. We show that for any given \lambda, the connected locus in the a-plane contains a full continuum which is almost a double covering of the filled-in Julia set for the quadratic ...

13

2023-06

Stability scattering diagrams and quiver coverings

学术报告题目：Stability scattering diagrams and quiver coverings报告人：覃帆教授（上海交通大学数学学院）时间：2023年6月14日星期三下午1:30---2:30地点：浙江大学紫金港校区海纳苑2栋210室摘要：In this talk, we introduce nice gradings associated to quiver coverings. We explain that Bridgeland’s stability scattering diagrams respect quiver coverings if nice grading exist. In particular, our results app...

13

2023-06

Connectedness of Hurwitz spaces and strong approximation for the Markoff equation

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