An upper bound for the harmonious chromatic number of a graph G is given. Three corollaries of the theorem are theorems or improvements of the theorems of Miller and Pritikin. The assignment of colors to the vertices of a graph such that each vertex has exactly one color has been studied for well o
An upper bound for the k-domination number of a graph
β Scribed by E. J. Cockayne; B. Gamble; B. Shepherd
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 82 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0364-9024
No coin nor oath required. For personal study only.
β¦ Synopsis
The kdomination number of a graph G, y k ( G ) , is the least cardinality of a set U of verticies such that any other vertex is adjacent to at least k vertices of U. We prove that if each vertex has degree at least k. then YAG) 5 kp/(k + 1).
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 In this paper we consider those graphs that have maximum degree at least 1/__k__ times their order, where __k__ is a (small) positive integer. A result of Hajnal and SzemerΓ©di concerning equitable vertexβcolorings and an adaptation of the standard proof of Vizing's Theorem are used to s
We consider the well-known upper bounds Β΅(G) β€ |V (G)|-β(G), where β(G) denotes the maximum degree of G and Β΅(G) the irredundance, domination or independent domination numbers of G and give necessary and sufficient conditions for equality to hold in each case. We also describe specific classes of gr