{ "id": "1608.06533", "version": "v1", "published": "2016-08-23T15:00:58.000Z", "updated": "2016-08-23T15:00:58.000Z", "title": "Size-Ramsey numbers of cycles versus a path", "authors": [ "Andrzej Dudek", "Farideh Khoeini", "Paweł Prałat" ], "comment": "arXiv admin note: text overlap with arXiv:1601.02564", "categories": [ "math.CO" ], "abstract": "The size-Ramsey number $\\hat{R}(\\mathcal{F},H)$ of a family of graphs $\\mathcal{F}$ and a graph $H$ is the smallest integer $m$ such that there exists a graph $G$ on $m$ edges with the property that any colouring of the edges of $G$ with two colours, say, red and blue, yields a red copy of a graph from $\\mathcal{F}$ or a blue copy of $H$. In this paper we first focus on $\\mathcal{F} = \\mathcal{C}_{\\le cn}$, where $\\mathcal{C}_{\\le cn}$ is the family of cycles of length at most $cn$, and $H = P_n$. In particular, we show that $2.00365 n \\le \\hat{R}(\\mathcal{C}_{\\le n},P_n) \\le 31n$. Using similar techniques, we also managed to analyze $\\hat{R}(C_n,P_n)$, which was investigated before but only using the regularity method.", "revisions": [ { "version": "v1", "updated": "2016-08-23T15:00:58.000Z" } ], "analyses": { "keywords": [ "size-ramsey number", "regularity method", "smallest integer", "blue copy", "first focus" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }