Samit Dasgupta (Duke University)

Event

TITLE :
Stark's Conjectures and Hilbert's 12th Problem.

ABSTRACT :
In this talk we will discuss two central problems in algebraic number theory and their interconnections: explicit class field theory and the special values of L-functions. The goal of explicit class field theory is to describe the abelian extensions of a ground number field via analytic means intrinsic to the ground field; this question lies at the core of Hilbert's 12th Problem. Meanwhile, there is an abundance of conjectures on the values of L-functions at certain special points. Of these, Stark's Conjecture has relevance toward explicit class field theory. I will describe two recent joint results with Mahesh Kakde on these topics. The first is a proof of the Brumer-Stark conjecture away from p=2. This conjecture states the existence of certain canonical elements in abelian extensions of totally real fields. The second is a proof of an exact formula for Brumer-Stark units that has been developed over the last 15 years. We show that these units together with other easily written explicit elements generate the maximal abelian extension of a totally real field, thereby giving a p-adic solution to the question of explicit class field theory for these fields.

HYBRIDE

This conference will be held in hybrid mode with a limited number of 21 participants on site. To reserve your place by first come, first serve, please use the link below.

ON-SITE : CRM - Pavillon André Aisenstadt: Salle/ Room 5340

https://www.eventbrite.ca/e/inscription-csmq-decembre-2021-december-215934143837

Vaccination passport and ID will be required

 

ZOOM:

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Weekly: https://umontreal.zoom.us/meeting/tJckf-qrrzgoG9EqIxUGtZlCaHo_F4k2H9ZF/ics?icsToken=98tyKuCrpzMpGdWWshiCRowqHYqgb-nzmHZBjfp4jTb9NgdHWA_VN8pNDZQrG4r4


Zoom: https://umontreal.zoom.us/j/93983313215?pwd=clB6cUNsSjAvRmFMME1PblhkTUtsQT09
ID de réunion : 939 8331 3215
Code secret : 096952
 


 

 

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