Ramsey unsaturated and saturated graphs
✍ Scribed by P. Balister; J. Lehel; R.H. Schelp
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 119 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0364-9024
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✦ Synopsis
Abstract
A graph is Ramsey unsaturated if there exists a proper supergraph of the same order with the same Ramsey number, and Ramsey saturated otherwise. We present some conjectures and results concerning both Ramsey saturated and unsaturated graphs. In particular, we show that cycles C~n~ and paths P~n~ on n vertices are Ramsey unsaturated for all n ≥ 5. © 2005 Wiley Periodicals, Inc.
📜 SIMILAR VOLUMES
A graph G is called a ( p, q)-split graph if its vertex set can be partitioned into A, B so that the order of the largest independent set in A is at most p and the order of the largest complete subgraph in B is at most q. Applying a well-known theorem of Erdo s and Rado for 2-systems, it is shown th
## Abstract A graph is said to be detour‐saturated if the addition of any edge results in an increased greatest path length. In this paper, we add to the relatively small amount that is known about detour‐saturated graphs. Our main result is a determination of all connected detour‐saturated graphs
The following results are obtained. (i) Let p, d, and k be fixed positive integers, and let G be a graph whose vertex set can be partitioned into parts V~, 112 ..... Va such that for each i at most d vertices in V~ U... U V, have neighbors in V~+~ and r(Kk, (Vi))<~ pIV(G) I, where (V i) denotes the