Let C be a simple graph. let JiGI denote the maximum degree of it\ \erlicek. ,III~ Ic~r \ 1 C; 1 denote irs chromatic pumber. Brooks' Theorem asserb lha1 ytG I'--AI G I. unk\\ C; hd.. .I component that is a COI lplete graph K,,,,\_ ,. or ullesq .I1 G I = 2 and G ha\ ;~n c~rld C\CIC
On bounding the chromatic number of L-graphs
β Scribed by Sean McGuinness
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 585 KB
- Volume
- 154
- Category
- Article
- ISSN
- 0012-365X
No coin nor oath required. For personal study only.
β¦ Synopsis
We show that the intersection graph of a collection of subsets of the plane, where each subset forms an "L" shape whose vertical stem is infinite, has its chromatic number 1 bounded by a function of the order of its largest clique w, where it is shown that ;1<2"4'3"4"'~'-". This proves a special case of a conjecture of Gyarf& and Lehel.
π SIMILAR VOLUMES
We give an upper bound on the chromatic number of a graph in terms of its maximum degree and the size of the largest complete subgraph. Our result extends a theorem due to i3rook.s.
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## Abstract The upper bound for the harmonious chromatic number of a graph given by Zhikang Lu and by C. McDiarmid and Luo Xinhua, independently (__Journal of Graph Theory__, 1991, pp. 345β347 and 629β636) and the lower bound given by D. G. Beane, N. L. Biggs, and B. J. Wilson (__Journal of Graph T
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