English

Level algebras and $\boldsymbol{s}$-lecture hall polytopes

Combinatorics 2020-08-19 v3

Abstract

Given a family of lattice polytopes, a common endeavor in Ehrhart theory is the classification of those polytopes in the family that are Gorenstein, or more generally level. In this article, we consider these questions for s\boldsymbol{s}-lecture hall polytopes, which are a family of simplices arising from s\boldsymbol{s}-lecture hall partitions. In particular, we provide concrete classifications for both of these properties purely in terms of s\boldsymbol{s}-inversion sequences. Moreover, for a large subfamily of s\boldsymbol{s}-lecture hall polytopes, we provide a more geometric classification of the Gorenstein property in terms of its tangent cones. We then show how one can use the classification of level s\boldsymbol{s}-lecture hall polytopes to construct infinite families of level s\boldsymbol{s}-lecture hall polytopes, and to describe level s\boldsymbol{s}-lecture hall polytopes in small dimensions.

Keywords

Cite

@article{arxiv.1710.10892,
  title  = {Level algebras and $\boldsymbol{s}$-lecture hall polytopes},
  author = {Florian Kohl and McCabe Olsen},
  journal= {arXiv preprint arXiv:1710.10892},
  year   = {2020}
}

Comments

Final version, to appear in Electronic Journal of Combinatorics

R2 v1 2026-06-22T22:29:36.170Z