On the Computational Complexity of the Forcing Chromatic Number
β Scribed by Harary, Frank; Slany, Wolfgang; Verbitsky, Oleg
- Book ID
- 118180698
- Publisher
- Society for Industrial and Applied Mathematics
- Year
- 2007
- Tongue
- English
- Weight
- 284 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0097-5397
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π SIMILAR VOLUMES
## Abstract Circular chromatic number, Ο~__c__~ is a natural generalization of chromatic number. It is known that it is **NP**βhard to determine whether or not an arbitrary graph __G__ satisfies Ο(__G__)=Ο~__c__~(__G__). In this paper we prove that this problem is **NP**βhard even if the chromatic
## Abstract Star chromatic number, introduced by A. Vince, is a natural generalization of chromatic number. We consider the question, βWhen is Ο\* < Ο?β We show that Ο\* < Ο if and only if a particular digraph is acyclic and that the decisioin problem associated with this question is probably not i
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