Thin polytopes: Lattice polytopes with vanishing local $h^*$-polynomial

TL;DR

This paper introduces the concept of thin polytopes with vanishing local $h^*$-polynomials, providing a complete classification up to dimension 3 and exploring their properties in Gorenstein polytopes.

Contribution

It offers the first comprehensive classification of thin polytopes up to dimension 3 and characterizes thinness in Gorenstein polytopes, advancing Ehrhart theory.

Findings

Complete classification of thin polytopes up to dimension 3

Characterization of thinness in Gorenstein polytopes

Survey of local $h^*$-polynomial properties

Abstract

In this paper we study the novel notion of thin polytopes: lattice polytopes whose local $h^*$-polynomials vanish. The local $h^*$-polynomial is an important invariant in modern Ehrhart theory. Its definition goes back to Stanley with fundamental results achieved by Karu, Borisov & Mavlyutov, Schepers, and Katz & Stapledon. The study of thin simplices was originally proposed by Gelfand, Kapranov and Zelevinsky, where in this case the local $h^*$-polynomial simply equals its so-called box polynomial. Our main results are the complete classification of thin polytopes up to dimension 3 and the characterization of thinness for Gorenstein polytopes. The paper also includes an introduction to the local $h^*$-polynomial with a survey of previous results.