Classifying abelian groups through acyclic matchings

Abstract

The inquiry into identifying sets of monomials that can be eliminated from a generic homogeneous polynomial via a linear change of coordinates was initiated by E. K. Wakeford. This linear algebra problem prompted C. K. Fan and J. Losonczy to introduce the notion of acyclic matchings in the additive group ${\mathbb{Z}}^n$, subsequently extended to abelian groups by the latter author. Alon, Fan, Kleitman, and Losonczy established the acyclic matching property for ${\mathbb{Z}}^n$. This note aims to classify all abelian groups with respect to the acyclic matching property.

Fixed some minor errors. To appear in Annals of Combinatorics