English

Size-Ramsey numbers of cycles versus a path

Combinatorics 2016-08-24 v1

Abstract

The size-Ramsey number R^(F,H)\hat{R}(\mathcal{F},H) of a family of graphs F\mathcal{F} and a graph HH is the smallest integer mm such that there exists a graph GG on mm edges with the property that any colouring of the edges of GG with two colours, say, red and blue, yields a red copy of a graph from F\mathcal{F} or a blue copy of HH. In this paper we first focus on F=Ccn\mathcal{F} = \mathcal{C}_{\le cn}, where Ccn\mathcal{C}_{\le cn} is the family of cycles of length at most cncn, and H=PnH = P_n. In particular, we show that 2.00365nR^(Cn,Pn)31n2.00365 n \le \hat{R}(\mathcal{C}_{\le n},P_n) \le 31n. Using similar techniques, we also managed to analyze R^(Cn,Pn)\hat{R}(C_n,P_n), which was investigated before but only using the regularity method.

Keywords

Cite

@article{arxiv.1608.06533,
  title  = {Size-Ramsey numbers of cycles versus a path},
  author = {Andrzej Dudek and Farideh Khoeini and Paweł Prałat},
  journal= {arXiv preprint arXiv:1608.06533},
  year   = {2016}
}

Comments

arXiv admin note: text overlap with arXiv:1601.02564