{ "id": "0907.2657", "version": "v1", "published": "2009-07-15T17:10:01.000Z", "updated": "2009-07-15T17:10:01.000Z", "title": "The Ramsey number of dense graphs", "authors": [ "David Conlon" ], "comment": "15 pages", "doi": "10.1112/blms/bds097", "categories": [ "math.CO" ], "abstract": "The Ramsey number r(H) of a graph H is the smallest number n such that, in any two-colouring of the edges of K_n, there is a monochromatic copy of H. We study the Ramsey number of graphs H with t vertices and density \\r, proving that r(H) \\leq 2^{c \\sqrt{\\r} \\log (2/\\r) t}. We also investigate some related problems, such as the Ramsey number of graphs with t vertices and maximum degree \\r t and the Ramsey number of random graphs in \\mathcal{G}(t, \\r), that is, graphs on t vertices where each edge has been chosen independently with probability \\r.", "revisions": [ { "version": "v1", "updated": "2009-07-15T17:10:01.000Z" } ], "analyses": { "subjects": [ "05C55" ], "keywords": [ "ramsey number", "dense graphs", "smallest number", "monochromatic copy", "maximum degree" ], "tags": [ "journal article" ], "note": { "typesetting": "TeX", "pages": 15, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2009arXiv0907.2657C" } } }