On the Brauer class of Modular Endomorphism Algebras
Number Theory
2026-02-17 v1 Algebraic Geometry
Abstract
We investigate the Brauer class of the endomorphism algebra of the motive attached to a non-CM form. The ramification of the algebra is shown in many cases to be controlled by the normalized slopes of the form.
Cite
@article{arxiv.2602.13401,
title = {On the Brauer class of Modular Endomorphism Algebras},
author = {Enrique González-Jiménez and Eknath Ghate and Jordi Quer},
journal= {arXiv preprint arXiv:2602.13401},
year = {2026}
}
Comments
Updated version with references, minor corrections, and table including k=5, relative to the published version