Lower bounds for lower Ramsey numbers
β Scribed by Ralph Faudree; Ronald J. Gould; Michael S. Jacobson; Linda Lesniak
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 310 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0364-9024
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
For any graph G, let i(G) and ΞΌ;(G) denote the smallest number of vertices in a maximal independent set and maximal clique, respectively. For positive integers m and n, the lower Ramsey number s(m, n) is the largest integer p so that every graph of order p has i(G) β€ m or ΞΌ;(G) β€ n. In this paper we give several new lower bounds for s (m, n) as well as determine precisely the values s(1, n).
π SIMILAR VOLUMES
There is a family (H k ) of graphs such that H k has order (1+o(1))(-2Γe) k 2 kΓ2 but has no clique or stable set of order k. This result of Spencer provides the best known lower bound for the diagonal Ramsey numbers R(k, k). Here we see that the graphs H k can be taken to be regular, self-complemen
## dedicated to the memory of rodica simion Let G be an r-uniform hypergraph. The multicolor Ramsey number r k G is the minimum n such that every k-coloring of the edges of the complete r-uniform hypergraph K r n yields a monochromatic copy of G. Improving slightly upon results from M. Axenovich,
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A new construction of self-complementary graphs containing no Klo or K , is described. This construction gives the Ramsey number lower bounds r(10,lO) 2 458 and r(1 1,l 1 ) 2 542. The problem of determining the Ramsey numbers is known to be very difficult and so we are often satisfied with partial