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A note on constructive methods for ramsey numbers

โœ Scribed by F. R. K. Chung


Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
227 KB
Volume
5
Category
Article
ISSN
0364-9024

No coin nor oath required. For personal study only.

โœฆ Synopsis


Abstract

Let r(k) denote the least integer nโ€such that for any graph G on n vertices either G or its complement G contains a complete graph K~k~ on k vertices. in this paper, we prove the following lower bound for the Ramsey number r(k) by explicit construction: r(k) โ‰ฅ exp (c(Log k)^4/3^[(log log k)^1/3^] for some constant c> 0.


๐Ÿ“œ SIMILAR VOLUMES


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โœ Vladimir Nikiforov; Cecil C. Rousseau ๐Ÿ“‚ Article ๐Ÿ“… 2005 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 87 KB ๐Ÿ‘ 1 views

## Abstract The __book with n pages__ __B__~__n__~ is the graph consisting of __n__ triangles sharing an edge. The __book Ramsey number__ __r__(__B__~__m__~,__B__~__n__~) is the smallest integer __r__ such that either __B__~__m__~โ€‰โŠ‚โ€‰__G__ or __B__~__n__~โ€‰โŠ‚โ€‰__G__ for every graph __G__ of order __r__

A constructive approach for the lower bo
โœ Xu Xiaodong; Xie Zheng; Stanisล‚aw P. Radziszowski ๐Ÿ“‚ Article ๐Ÿ“… 2004 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 89 KB ๐Ÿ‘ 1 views

## Abstract Graph __G__ is a (__k__,โ€‰__p__)โ€graph if __G__ does not contain a complete graph on __k__ vertices __K__~__k__~, nor an independent set of order __p__. Given a (__k__,โ€‰__p__)โ€graph __G__ and a (__k__,โ€‰__q__)โ€graph __H__, such that __G__ and __H__ contain an induced subgraph isomorphic t

On ramsey numbers for books
โœ C. C. Rousseau; J. Sheehan ๐Ÿ“‚ Article ๐Ÿ“… 1978 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 479 KB

For n = 1, 2, . . . , let 6, = K2+ K,,. We pose the problem of determining the Ramsey numbers r(&, B,) and demonstrate that in many cases critical colorings are available from known examples of strongly regular graphs.

On irredundant Ramsey numbers for graphs
โœ Johannes H. Hattingh ๐Ÿ“‚ Article ๐Ÿ“… 1990 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 248 KB

## Abstract The irredundant Ramsey number __s(m, n)__ is the smallest p such that in every twoโ€coloring of the edges of __K~p~__ using colors red (__R__) and blue (__B__), either the blue graph contains an __m__โ€element irredundant set or the red graph contains an __n__โ€element irredundant set. We

On ramsey-tuล•an numbers for 3-graphs
โœ A. F. Sidorenko ๐Ÿ“‚ Article ๐Ÿ“… 1992 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 255 KB

## Abstract For every __r__โ€graph __G__ let ฯ€(__G__) be the minimal real number ฯต such that for every ฯต < 0 and __n__ ฯต __n__~0~(ฮป, __G__) every __R__โ€graph __H__ with __n__ vertices and more than (ฯ€ + ฯต)(nr) edges contains a copy of __G__. The real number ฮป(__G__) is defined in the same way, addin