{ "id": "1704.07104", "version": "v1", "published": "2017-04-24T09:18:17.000Z", "updated": "2017-04-24T09:18:17.000Z", "title": "Equivalence classes of mesh patterns with a dominating pattern", "authors": [ "Murray Tannock", "Henning Ulfarsson" ], "categories": [ "math.CO" ], "abstract": "Two mesh patterns are coincident if they are avoided by the same set of permutations, and are Wilf-equivalent if they have the same number of avoiders of each length. We provide sufficient conditions for coincidence of mesh patterns, when only permutations also avoiding a longer classical pattern are considered. Using these conditions we completely classify coincidences between families containing a mesh pattern of length 2 and a classical pattern of length 3. Furthermore, we completely Wilf-classify mesh patterns of length 2 inside the class of 231-avoiding permutations.", "revisions": [ { "version": "v1", "updated": "2017-04-24T09:18:17.000Z" } ], "analyses": { "subjects": [ "05A05", "05A15" ], "keywords": [ "equivalence classes", "dominating pattern", "permutations", "sufficient conditions", "wilf-classify mesh patterns" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }