{ "id": "1603.08153", "version": "v1", "published": "2016-03-26T23:15:11.000Z", "updated": "2016-03-26T23:15:11.000Z", "title": "Rainbow Arithmetic Progressions in Finite Abelian Groups", "authors": [ "Michael Young" ], "categories": [ "math.CO" ], "abstract": "For positive integers $n$ and $k$, the \\emph{anti-van der Waerden number} of $\\mathbb{Z}_n$, denoted by $aw(\\mathbb{Z}_n,k)$, is the minimum number of colors needed to color the elements of the cyclic group of order $n$ and guarantee there is a rainbow arithmetic progression of length $k$. Butler et al. showed a reduction formula for $aw(\\mathbb{Z}_{n},3) = 3$ in terms of the prime divisors of $n$. In this paper, we analagously define the anti-van der Waerden number of a finite abelian group $G$ and show $aw(G,3)$ is determined by the order of $G$ and the number of groups with even order in a direct sum isomorphic to $G$. The \\emph{unitary anti-van der Waerden number} of a group is also defined and determined.", "revisions": [ { "version": "v1", "updated": "2016-03-26T23:15:11.000Z" } ], "analyses": { "keywords": [ "finite abelian group", "rainbow arithmetic progression", "anti-van der waerden number", "direct sum isomorphic", "cyclic group" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2016arXiv160308153Y" } } }