A bound on the Hartshorne-Speiser-Lyubeznik number of semigroup rings

Proceedings of the American Mathematical Society 2026 Open access

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Authors: Havi Ellers
DOI: 10.1090/proc/17695
Cited by: 0
References: 19

Abstract

In this paper we prove an explicit, computable upper bound on the Hartshorne-Speiser-Lyubeznik number of the local cohomology of a pointed, affine semigroup ring over a field of positive characteristic. This bound depends only on the characteristic of the ring and properties of the semigroup.

Fields of Study & Subjects

Commutative Algebra and Its Applications Rings Modules and Algebras Algebraic Geometry and Number Theory

Publication details

Journal / source
Proceedings of the American Mathematical Society
Publication date
5 March 2026
Language
EN