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Number Theory Seminar

Title: Asymptotics and codimensions of modules over Iwasawa algebras
Speaker: Sujatha Ramdorai (University of British Columbia, Canada)
Date: 04 February 2022
Time: 3 pm
Venue: Microsoft Teams (Online)

Let $R$ be the Iwasawa algebra over a compact, $p$-adic, pro-$p$ group $G$, where $G$ arises as a Galois group of number fields from Galois representations. Suppose $M$ is a finitely generated $R$-module. In the late 1970’s , Harris studied the asymptotic growth of the ranks of certain coinvariants of $M$ arising from the action of open subgroups of $G$ and related them to the codimension of $M$. In this talk, we explain how Harris’ proofs can be simplified and improved upon, with possible applications to studying some natural subquotients of the Galois groups of number fields.

Contact: +91 (80) 2293 2711, +91 (80) 2293 2265 ;     E-mail: chair.math[at]iisc[dot]ac[dot]in
Last updated: 08 Dec 2022