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Erschienen in:
2012 | OriginalPaper | Buchkapitel
Cluster Vertex Deletion: A Parameterization between Vertex Cover and Clique-Width
verfasst von : Martin Doucha, Jan Kratochvíl
Erschienen in: Mathematical Foundations of Computer Science 2012
Verlag: Springer Berlin Heidelberg
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The
cluster vertex deletion
number of a graph is the minimum number of its vertices whose deletion results in a disjoint union of complete graphs. This generalizes the vertex cover number, provides an upper bound to the clique-width and is related to the previously studied notion of the twin cover of the graph under consideration. We study the fixed parameter tractability of basic graph theoretic problems related to coloring and Hamiltonicity parameterized by cluster vertex deletion number. Our results show that most of these problems remain fixed parameter tractable as well, and thus we push the borderline between tractability and intractability towards the clique-width parameter.