## Abstract In this paper we study multipartite Ramsey numbers for odd cycles. We formulate the following conjecture: Let __n__≥5 be an arbitrary positive odd integer; then, in any two‐coloring of the edges of the complete 5‐partite graph __K__((__n__−1)/2, (__n__−1)/2, (__n__−1)/2, (__n__−1)/2, 1)
The Ramsey numbers for disjoint unions of cycles
✍ Scribed by Tristan Denley
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 671 KB
- Volume
- 149
- Category
- Article
- ISSN
- 0012-365X
No coin nor oath required. For personal study only.
✦ Synopsis
As usual, for simple graphs G and H, let the Ramsey number r(G,H) be defined as the least number n such that for any graph K of order n, either G is a subgraph of K or H is a subgraph of/(. We shall establish the values of r(aC~,bCs) and r(aCv, bC7) almost precisely (where nG is the graph consisting of n vertex disjoint copies of G) extending the work of Mizuno and Sato, who proved similar results about r(aC4, bC4). Our technique also allows us to find a general upper bound for the Ramsey number r (aC,,, aC,,,) for any a >~1, n, m >/3.
📜 SIMILAR VOLUMES
## Abstract We determine the maximum number of colors in a coloring of the edges of __K~m,n~__ such that every cycle of length 2__k__ contains at least two edges of the same color. One of our main tools is a result on generalized path covers in balanced bipartite graphs. For positive integers __q__
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## Abstract Let __r__~__k__~(__G__) be the __k__‐color Ramsey number of a graph __G__. It is shown that $r\_{k}(C\_{5})\le \sqrt{18^{k}\,k!}$ for __k__⩾2 and that __r__~__k__~(__C__~2__m__+ 1~)⩽(__c__^__k__^__k__!)^1/__m__^ if the Ramsey graphs of __r__~__k__~(__C__~2__m__+ 1~) are not far away fr
## Abstract We prove that for all ε>0 there are α>0 and __n__~0~∈ℕ such that for all __n__⩾__n__~0~ the following holds. For any two‐coloring of the edges of __K__~__n, n, n__~ one color contains copies of all trees __T__ of order __t__⩽(3 − ε)__n__/2 and with maximum degree Δ(__T__)⩽__n__^α^. This