Structural parameterizations of clique coloring
Journal article, Peer reviewed
Published version
Åpne
Permanent lenke
https://hdl.handle.net/11250/2761078Utgivelsesdato
2020Metadata
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- Department of Informatics [921]
- Registrations from Cristin [9531]
Originalversjon
Leibniz International Proceedings in Informatics. 2020, 49, 49:1–49:15 10.4230/LIPIcs.MFCS.2020.49Sammendrag
A clique coloring of a graph is an assignment of colors to its vertices such that no maximal clique is monochromatic. We initiate the study of structural parameterizations of the Clique Coloring problem which asks whether a given graph has a clique coloring with q colors. For fixed q ≥ 2, we give an 𝒪^⋆(q^{tw})-time algorithm when the input graph is given together with one of its tree decompositions of width tw. We complement this result with a matching lower bound under the Strong Exponential Time Hypothesis. We furthermore show that (when the number of colors is unbounded) Clique Coloring is XP parameterized by clique-width.