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Domatic Partition on Several Classes of Graphs

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Combinatorial Optimization and Applications (COCOA 2012)

Part of the book series: Lecture Notes in Computer Science ((LNTCS,volume 7402))

Abstract

The domatic number of a graph G, denoted by DN(G), is the maximum number k such that V can be partitioned into k disjoint dominating sets. The domatic partition problem is to find a partition of the vertices of G into DN(G) dominating sets. The k-domatic partition problem with fixed k is to find a partition of the vertices of G into k dominating sets. In this paper, we show that 3-domatic partition problem is NP-complete on planar bipartite graphs, and the domatic partition problem is NP-complete on co-bipartite graphs. We further show that the unique 3-domatic partition problem is NP-hard on general graphs. Moreover, we propose an O(n)-time algorithm on the 3-domatic partition problem for maximal planar graphs, and O(n 3)-time algorithms on the domatic partition problem for P 4-sparse graphs and tree-cographs, respectively.

This research was supported by National Science Council, Taiwan, under the grant numbers NSC99-2221-E-128-003 and NSC100-2628-E-007-020-MY3.

Every author contributes to this research equally.

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Poon, SH., Yen, W.CK., Ung, CT. (2012). Domatic Partition on Several Classes of Graphs. In: Lin, G. (eds) Combinatorial Optimization and Applications. COCOA 2012. Lecture Notes in Computer Science, vol 7402. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-31770-5_22

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  • DOI: https://doi.org/10.1007/978-3-642-31770-5_22

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-31769-9

  • Online ISBN: 978-3-642-31770-5

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