## Abstract After giving a new proof of a wellβknown theorem of Dirac on critical graphs, we discuss the elegant upper bounds of Matula and SzekeresβWilf which follow from it. In order to improve these bounds, we consider the following fundamental coloring problem: given an edgeβcut (__V__~1~, __V_
An improved bound for the strong chromatic number
β Scribed by P. E. Haxell
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 156 KB
- Volume
- 58
- Category
- Article
- ISSN
- 0364-9024
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β¦ Synopsis
Abstract
Let Ξ·β>β0 be given. Then there exists d~0~β=βd~0~(Ξ·) such that the following holds. Let G be a finite graph with maximum degree at most dββ₯βd~0~ whose vertex set is partitioned into classes of size Ξ± d, where Ξ±β₯ 11/4β+βΞ·. Then there exists a proper coloring of G with Ξ±__d__ colors in which each class receives all Ξ±__d__ colors. Β© 2008 Wiley Periodicals, Inc. J Graph Theory 58:148β158, 2008
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