{ "id": "1102.1021", "version": "v2", "published": "2011-02-04T21:43:04.000Z", "updated": "2011-08-08T15:19:18.000Z", "title": "An improvement on Brooks' Theorem", "authors": [ "Landon Rabern" ], "categories": [ "math.CO" ], "abstract": "We prove that $\\chi(G) \\leq \\max {\\omega(G), \\Delta_2(G), (5/6)(\\Delta(G) + 1)}$ for every graph $G$ with $\\Delta(G) \\geq 3$. Here $\\Delta_2$ is the parameter introduced by Stacho that gives the largest degree that a vertex $v$ can have subject to the condition that $v$ is adjacent to a vertex whose degree is at least as large as its own. This upper bound generalizes both Brooks' Theorem and the Ore-degree version of Brooks' Theorem.", "revisions": [ { "version": "v2", "updated": "2011-08-08T15:19:18.000Z" } ], "analyses": { "keywords": [ "improvement", "upper bound generalizes", "largest degree", "ore-degree version" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2011arXiv1102.1021R" } } }