Regularity of deficiency modules through spectral sequences
Abstract
The main goal of this paper is to obtain upper bounds for the regularity of graded deficiency modules in the spirit of the one obtained by Kumini--Murai in the monomial case building upon the spectral sequence formalism developed by \`Alvarez Montaner, Boix and Zarzuela. This spectral sequence formalism allows us not only to recover Kumini--Murai's upper bound for monomial ideals, but also to extend it for other types of rings, which include toric face rings and some binomial edge rings, producing to the best of our knowledge new upper bounds for the regularity of graded deficiency modules of this type of rings.
Cite
@article{arxiv.2412.00092,
title = {Regularity of deficiency modules through spectral sequences},
author = {Alberto F. Boix and Santiago Zarzuela},
journal= {arXiv preprint arXiv:2412.00092},
year = {2026}
}
Comments
15 pages, comments are still welcome. The main change with respect to the previous version is Section 1 due to referee comments, main results unchanged. To appear in Mediterranean Journal of Mathematics