We consider colorings of the directed and undirected edges of a mixed multigraph G by an ordered set of colors. We color each undirected edge in one color and each directed edge in two colors, such that the color of the first half of a directed edge is smaller than the color of the second half. The
On bounds for the incidentor chromatic number of a directed weighted multigraph
β Scribed by V. G. Vizing
- Book ID
- 111471148
- Publisher
- Pleiades Publishing
- Year
- 2007
- Tongue
- English
- Weight
- 508 KB
- Volume
- 1
- Category
- Article
- ISSN
- 1990-4789
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π SIMILAR VOLUMES
## Abstract In this paper we discuss some estimates for upper bounds on a number of chromatic parameters of a multigraph. In particular, we show that the total chromatic number for an __n__βorder multigraph exceeds the chromatic index by the smallest __t__ such that __t__! > __n__.
## 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
## 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_