Next-to-minimal weight of toric codes defined over hypersimplices

Abstract

Toric codes are a type of evaluation codes introduced by J.P. Hansen in 2000. They are produced by evaluating (a vector space composed by) polynomials at the points of $({\mathbb{F}}_q^{\ast }{)}^s$, the monomials of these polynomials being related to a certain polytope. Toric codes related to hypersimplices are the result of the evaluation of a vector space of square-free homogeneous polynomials of degree $d$. The dimension and minimum distance of toric codes related to hypersimplices have been determined by Jaramillo et al. in 2021. The next-to-minimal weight in the case $d=1$ has been determined by Jaramillo-Velez et al. in 2023. In this work we use tools from Gröbner basis theory to determine the next-to-minimal weight of these codes for $d$ such that $3\le d\le \frac{s-2}{2}$ or $\frac{s+2}{2}\le d<s$.

arXiv commentTo appear in the Journal of Algebra and Its Applications