𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The pre-hull number and lexicographic product

✍ Scribed by Iztok Peterin


Book ID
113567434
Publisher
Elsevier Science
Year
2012
Tongue
English
Weight
223 KB
Volume
312
Category
Article
ISSN
0012-365X

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πŸ“œ SIMILAR VOLUMES


Star-extremal graphs and the lexicograph
✍ Guogang Gao; Xuding Zhu πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 537 KB

The star-chromatic number and the fractional-chromatic number are two generalizations of the ordinary chromatic number of a graph. We say a graph G is star-extremal if its star-chromatic number is equal to its fractional-chromatic number. We prove that star-extremal graphs G have the following inter