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Thu, 27 Feb 2025

16:00 - 17:00
Lecture Room 4

The wild Brauer-Manin obstruction

Margherita Pagano
(Imperial College London)
Abstract

A way to study rational points on a variety is by looking at their image in the p-adic points. Some natural questions that arise are the following: is there any obstruction to weak approximation on the variety? Which primes might be involved in it? I will explain how primes of good reduction can play a role in the Brauer-Manin obstruction to weak approximation, with particular emphasis on the case of K3 surfaces.

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