{ "id": "1903.11484", "version": "v1", "published": "2019-03-27T15:23:25.000Z", "updated": "2019-03-27T15:23:25.000Z", "title": "Cop number of $2K_2$-free graphs", "authors": [ "Vaidy Sivaraman", "Stephen Testa" ], "categories": [ "math.CO", "cs.DM" ], "abstract": "We prove that the cop number of a $2K_2$-free graph is at most $2$ if it has diameter $3$ or does not have an induced cycle of length $k$, where $k \\ \\in \\{3,4,5\\}$. We conjecture that the cop number of every $2K_2$-free graph is at most $2$.", "revisions": [ { "version": "v1", "updated": "2019-03-27T15:23:25.000Z" } ], "analyses": { "keywords": [ "free graph", "cop number", "induced cycle" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }