Explicit isomorphisms for a Herr-type complex over a metabelian extension
Number Theory
2026-03-24 v1 Representation Theory
Abstract
Let be a Banach algebra over whose residue fields are finite extensions of . Given an arithmetic family of Galois representations, i.e., a finite free -module with a continuous action of the absolute Galois group of a -adic number field, we construct a complex associated to over false-Tate extensions and construct explicit isomorphisms between its cohomology and the Galois cohomology. This recovers earlier results by Tavares Ribeiro when is a finite extension of .
Cite
@article{arxiv.2603.21681,
title = {Explicit isomorphisms for a Herr-type complex over a metabelian extension},
author = {Anand Chitrao and Aditya Karnataki and Jishnu Ray},
journal= {arXiv preprint arXiv:2603.21681},
year = {2026}
}