Fixed Parameter Algorithms for DOMINATING SET and Related Problems on Planar Graphs
Fixed Parameter Algorithms for DOMINATING SET and Related Problems on Planar Graphs
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DOI:
10.1007/s00453-001-0116-5
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发表时间:
2002-08
期刊:
影响因子:
1.1
通讯作者:
J. Alber;H. Bodlaender;H. Fernau;T. Kloks;R. Niedermeier
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文献类型:
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作者:
J. Alber;H. Bodlaender;H. Fernau;T. Kloks;R. Niedermeier
Abstract.We present an algorithm that constructively produces a solution to thek-DOMINATING SET problem for planar graphs in timeO(c^ \sqrt k n), wherec=4^ 6\sqrt 34. To obtain this result, we show that the treewidth of a planar graph with domination numberγ (G)isO(\sqrt \rule 0pt 4pt \smash γ (G) ), and that such a tree decomposition can be found inO(\sqrt \rule 0pt 4pt \smash γ (G) n)time. The same technique can be used to show that thek-FACE COVER problem (find a sizekset of faces that cover all vertices of a given plane graph) can be solved inO(c1^ \sqrt k n)time, wherec1=3^ 36\sqrt 34andkis the size of the face cover set. Similar results can be obtained in the planar case for some variants ofk-DOMINATING SET, e.g.,k-INDEPENDENT DOMINATING SET andk-WEIGHTED DOMINATING SET.