{ "id": "2305.04907", "version": "v1", "published": "2023-05-08T17:44:57.000Z", "updated": "2023-05-08T17:44:57.000Z", "title": "On the minimum blocking semioval in PG(2,11)", "authors": [ "Jeremy M. Dover" ], "comment": "13 pages, 1 figure", "categories": [ "math.CO" ], "abstract": "A blocking semioval is a set of points in a projective plane that is both a blocking set (i.e., every line meets the set, but the set contains no line) and a semioval (i.e., there is a unique tangent line at each point). The smallest size of a blocking semioval is known for all finite projective planes of order less than 11; we investigate the situation in PG(2,11).", "revisions": [ { "version": "v1", "updated": "2023-05-08T17:44:57.000Z" } ], "analyses": { "subjects": [ "51E21" ], "keywords": [ "minimum blocking semioval", "unique tangent line", "line meets", "set contains", "finite projective planes" ], "note": { "typesetting": "TeX", "pages": 13, "language": "en", "license": "arXiv", "status": "editable" } } }