3 papers
math.AC2024
A bound on the Hartshorne-Speiser-Lyubeznik number of semigroup rings
Havi Ellers
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 perfect fie…
math.AC2022
Variants of normality and steadfastness deform
Alexander Bauman, Havi Ellers, Gary Hu +3
The cancellation problem asks whether implies . Hamann introduced the class of steadfast rings as the rings for which…
math.NT2017
Numbers Represented by a Finite Set of Binary Quadratic Forms
Christopher Donnay, Havi Ellers, Kate O'Connor +2
Every quadratic form represents 0; therefore, if we take any number of quadratic forms and ask which integers are simultaneously represented by all members of the collection, we ar…