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关于举行芬兰奥卢大学吴猛副教授学术报告会的通知

发布时间:2020-12-04文章来源:华南理工大学数学学院浏览次数:371

报告题目:Covering the Sierpinski carpet by tubes

报  告  人:猛  副教授(芬兰奥卢大学)

报告时间:20201211日(星期五)下午16:00-17:00 

报告地点:腾讯会议, ID836 147 469 会议密码:654321

邀  请  人:李兵  教授

欢迎广大师生前往!

数学学院

2020124

 

报告摘要:

A planar set is called tube-null if it can be covered by a union of tubular neighbourhoods of lines with the sum of their widths arbitrarily small. Such sets arise in the localization problem for the Fourier transform. Any set of finite one-dimensional Hausdorff measure is easily seen to be tube-null, but it is often hard to determine whether a given set of dimension larger than 1 is tube-null or not. In particular, there were very few (non-trivial) examples of tube-null sets of large dimension. I will present our recent result, joint with A. Pyörälä, P. Shmerkin and V. Suomala, that the Sierpinski carpet is tube null. More generally, any times-N invariant set other than the torus is tube-null.

 

报告人简介:

吴猛,芬兰奥卢大学(University of Oulu)副教授(Associate Professor)。2013年于法国亚眠大学(Universite de Picardie)获得博士学位。他主要从事动力系统与遍历理论,及其在数论和分形几何方面的应用。相关工作发表在Annals Math Adv. Math.等期刊。最突出成果为证明了 H. Furstenberg 1969年提出的交集猜测。于2018年获得了芬兰科学院的Academy Research Fellowship (2018-2023年同时受聘为芬兰科学院研究员)