English

A note on toric ideals of graphs and Knutson-Miller-Yong decompositions

Commutative Algebra 2025-02-13 v1 Combinatorics

Abstract

We use a Gr\"obner basis technique first introduced by Knutson, Miller and Yong to study the interplay between properties of a graph GG and algebraic properties of the toric ideal that it defines. We first recover a well-known height formula for the toric ideal of a graph IGI_G and demonstrate an algebraic property that can detect when a graph deletion is bipartite. We also bound the chromatic number χ(G)\chi(G) using information about an initial ideal of IGI_G.

Keywords

Cite

@article{arxiv.2502.08069,
  title  = {A note on toric ideals of graphs and Knutson-Miller-Yong decompositions},
  author = {Sergio Da Silva and Emma Naguit and Jenna Rajchgot},
  journal= {arXiv preprint arXiv:2502.08069},
  year   = {2025}
}

Comments

12 pages, 1 figure