## Abstract A graph is point determining if distinct vertices have distinct neighborhoods. The nucleus of a pointβdetermining graph is the set __G__^O^ of all vertices, __v__, such that __G__β__v__ is point determining. In this paper we show that the size, Ο(__G__), of a maximum clique in __G__ sat
An upper bound on the size of the largest cliques in a graph
β Scribed by Alain Billionnet
- Publisher
- John Wiley and Sons
- Year
- 1981
- Tongue
- English
- Weight
- 194 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0364-9024
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β¦ Synopsis
Abstract
We produce in this paper an upper bound for the number of vertices existing in a clique of maximum cardinal. The proof is based in particular on the existence of a maximum cardinal clique that contains no vertex x such that the neighborhood of x is contained in the neighborhood of another vertex y.
π SIMILAR VOLUMES
## Abstract The upper bound for the harmonious chromatic number of a graph that has been given by SinβMin Lee and John Mitchem is improved.
## Abstract Harary stated the conjecture that for any graph __G__ with __n__ edges and without isolated vertices __r__(__K__~3~,__G__) β©½ 2__n__ + 1. ErdΓΆs, Faudree, Rousseau, and Schelp proved that __r__(__K__~3~,__G__) β©½ β8/3__n__β. Here we prove that __r__(__K__~3~,__G__) β©½ β5/2__n__β β1 for __n_
A graph 1 is parity embedded in a surface if a closed path in the graph is orientation preserving or reversing according to whether its length is even or odd. The parity demigenus of 1 is the minimum of 2&/(S) (where / is the Euler characteristic) over all surfaces S in which 1 can be parity embedde
Using a technique developed by A. Nilli (1991, Discrete Math. 91, 207 210), we estimate from above the Cheeger number of a finite connected graph G of small degree (2(G) 5) admitting sufficiently distant edges. ## 2001 Academic Press Let G=(V(G), E(G)) be a finite connected graph. The Cheeger numb