Re: 首都师范大学算术几何讨论班（2017-7-17）

[xu...@math.ac.cn]

诸位：

首师大算术代数几何讨论班（见附件）：

 

报告人：曹阳博士（巴黎11大）

报告时间：7月17日（星期一），下午4:30-5:30

地点：首师大校本部新教二楼813教室

报告题目：Invariant Brauer subgroup and iterated descent obstruction 

报告摘要：

I will talk on my result: for a smooth quasi-projective variety over a number field,   the iterated descent obstruction is equivalent to the descent obstruction. For smooth, projective varieties, this answers an open question of Poonen.  The key idea  is the notion of invariant Brauer subgroup and the notion of invariant étale Brauer-Manin obstruction for a smooth variety equipped with an action of a connected linear algebraic group.

 

欢迎参加！

 

徐飞

 

[xu...@math.ac.cn]

诸位：

首师大《数论与代数几何》讨论班。

报告人：胡勇教授（南方科技大学）

时间：8月9日，4:30-5:30

地点：首师大校本部新教二楼727教室

题目：Finiteness theorems and cycle class maps for zero-cycles over local fields (after S. Saito, K. Sato, M. Kerz, H. Esnault, O. Wittenberg et al)

摘要：Let X be a smooth projective variety over a complete discrete valuation field K, and let A_0(X) be its Chow groups of zero-cycles of degree 0. This talk will be a survey on recent works on the structure of A_0(X), especially finiteness theorems, by S. Saito, K. Sato, M. Kerz, H. Esnault, O. Wittenberg et al. I will mainly focus on the case where K is a p-adic field, for which Saito and Sato proved a conjecture of Colliot-Thelene by using a cycle class map defined over regular models of X. Time permitting, the more general case where K has a perfect residue field will also be sketched.

欢迎大家参加。

祝好！

徐飞

[xu...@math.ac.cn]

诸位：

首师大《数论与代数几何》讨论班。

报告人：Preda Mihailescu 教授（德国哥廷根大学）

报告时间：9月12日（星期二）下午4:30-5:30。

地点：首师大校本部新教二楼827教室

报告题目：The charm of Units

摘要：We investigate properties of some units arising from the Kummer-Vandiver. 

欢迎大家参加。

祝好！

徐飞

[xu...@math.ac.cn]

诸位：

欢迎参加下周首师大算术几何讨论班。

报告人：Chia-Fu Yu 教授（台湾中研院）

 

报告时间：9月20日（星期三）下午：4:30-5:30

地点：首师大新教二楼325教室 

报告题目: Explicit formulas for superspecial abelian surfaces over finite fields 
摘要: In this talk, I plan to describe explicit formulas for the number of superspecial abelian surfaces over finite fields and of the isomorphism classes of their endomorphism rings. I will also explain key ingredients in the computation. This is joint work with Jiangwei Xue and Tse-Chung Yang.  

[xu...@math.ac.cn]

 

诸位：

 

欢迎参加下周首师大《代数几何与数论》讨论班。

 

 

 

报告人：Emmanuel Lecouturier 博士 （法国巴黎七大）

时间：10月 17日（星期二）下午 4:30-5:30

 

地点：首师大校本部教二楼612室

 

报告题目： HIGHER EISENSTEIN ELEMENTS, HIGHER EICHLER FORMULAS AND
RANK OF HECKE ALGEBRAS

 

摘要：In his classical work, Mazur considers the Eisenstein ideal I of the Hecke algebra T acting on
cusp forms of weight 2 and level N where N is prime. When p is an Eisenstein prime, i.e. p
divides the numerator of (N-1)/12 , denote by H the completion of T at the maximal ideal generated
by I and p. This is a Zp-algebra of finite rank as a Zp-module. In this talk, I'll report some recent progress on this rank.

 

祝好！

 

徐飞