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arXiv · 2503.02501

Ehrhart spectra of large subsets of $\mathbb{Z}^r$

Michael Björklund·Rickard Cullman·Alexander Fish
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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 $n \in \mathbb{Z}^r$ 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 author for the volume spectrum of $E$.

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Michael Björklund, Rickard Cullman, Alexander Fish. 2025-03-04. Ehrhart spectra of large subsets of $\mathbb{Z}^r$. https://arxiv.org/abs/2503.02501

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