{ "id": "1108.0989", "version": "v1", "published": "2011-08-04T03:35:47.000Z", "updated": "2011-08-04T03:35:47.000Z", "title": "The enumeration of permutations avoiding 2143 and 4231", "authors": [ "Michael Albert", "M. D. Atkinson", "Robert Brignall" ], "categories": [ "math.CO" ], "abstract": "We enumerate the pattern class Av(2143,4231) and completely describe its permutations. The main tools are simple permutations and monotone grid classes.", "revisions": [ { "version": "v1", "updated": "2011-08-04T03:35:47.000Z" } ], "analyses": { "subjects": [ "05A05", "05A15" ], "keywords": [ "permutations avoiding", "enumeration", "monotone grid classes", "pattern class av", "main tools" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2011arXiv1108.0989A" } } }