Ehrhart spectra of large subsets in $\mathbb Z^r$
Volume 180 / 2026
Colloquium Mathematicum 180 (2026), 37-49
MSC: Primary 11B30; Secondary 22D40, 05D10
DOI: 10.4064/cm9704-10-2025
Published online: 25 February 2026
Abstract
This paper introduces and studies the Ehrhart spectrum of a set $E \subseteq \mathbb {Z}^r$, defined as the set of all Ehrhart polynomials of simplices with vertices in $E$, generalizing the notion of volume spectrum. We show that for any $E \subseteq \mathbb {Z}^r$ with positive upper Banach density, there is some $n \in \mathbb {Z}$ such that the Ehrhart spectrum of $n \mathbb {Z} ^r$ is contained in the Ehrhart spectrum of $E$, generalizing an earlier result by the first and third authors for the volume spectrum of $E$.
