Class groups of number fields via algebraic stacks

Dan Loughran (University of Bath)

Wednesday 3rd December 16:00-17:00
Maths 311B

Abstract

The Cohen-Lenstra heuristics predict the distribution of class groups of number fields. Originally the number fields were ordered by discriminant, but Bartel-Lenstra found counter-examples with this ordering. In this talk I will put forward conjectures for which orderings should be allowed. This will be achieved via a new framework for heights on classifying stacks. This is joint work with Ross Paterson and Tim Santens.

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