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On Number of Circles Intersected by a Line

✍ Scribed by Lu Yang; Jingzhong Zhang; Weinian Zhang


Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
394 KB
Volume
98
Category
Article
ISSN
0097-3165

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## Abstract Let Ξ»(__G__) be the line‐distinguishing chromatic number and __x__β€²(__G__) the chromatic index of a graph __G__. We prove the relation Ξ»(__G__) β‰₯ __x__β€²(__G__), conjectured by Harary and Plantholt. Β© 1993 John Wiley & Sons, Inc.