English

Two types of size Ramsey numbers for matchings of small order

Combinatorics 2021-03-31 v2 Discrete Mathematics

Abstract

For simple graphs GG and HH, their size Ramsey number r^(G,H)\hat{r}(G,H) is the smallest possible size of FF such that for any red-blue coloring of its edges, FF contains either a red GG or a blue HH. Similarly, we can define the connected size Ramsey number r^c(G,H){\hat{r}}_c(G,H) by adding the prerequisite that FF must be connected. In this paper, we explore the relationships between these size Ramsey numbers and give some results on their values for certain classes of graphs. We are mainly interested in the cases where GG is either a 2K22K_2 or a 3K23K_2, and where HH is either a cycle CnC_n or a union of paths nPmnP_m. Additionally, we improve an upper bound regarding the values of r^(tK2,Pm)\hat{r}(tK_2,P_m) and r^c(tK2,Pm){\hat{r}}_c(tK_2,P_m) for certain tt and mm.

Keywords

Cite

@article{arxiv.2011.12065,
  title  = {Two types of size Ramsey numbers for matchings of small order},
  author = {Valentino Vito and Denny Riama Silaban},
  journal= {arXiv preprint arXiv:2011.12065},
  year   = {2021}
}

Comments

9 pages, 3 figures; contains minor improvements and additional remarks