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Erschienen in: Theory of Computing Systems 2/2015

01.02.2015

New Results on Polynomial Inapproximabilityand Fixed Parameter Approximability of Edge Dominating Set

verfasst von: Bruno Escoffier, Jérôme Monnot, Vangelis Th. Paschos, Mingyu Xiao

Erschienen in: Theory of Computing Systems | Ausgabe 2/2015

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Abstract

An edge dominating set in a graph G = (V, E) is a subset S of edges such that each edge in ES is adjacent to at least one edge in S. The edge dominating set problem, to find an edge dominating set of minimum size, is a basic and important NP-hard problem that has been extensively studied in approximation algorithms and parameterized complexity. In this paper, we present improved hardness results and parameterized approximation algorithms for edge dominating set. More precisely, we first show that it is NP-hard to approximate edge dominatingset in polynomial time within a factor better than 1.18. Next, we give a parameterized approximation schema (with respect to the standard parameter) for the problem and, finally, we develop an O (1.821 τ )-time exact algorithm where τ is the size of a minimum vertex cover of G.

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Metadaten
Titel
New Results on Polynomial Inapproximabilityand Fixed Parameter Approximability of Edge Dominating Set
verfasst von
Bruno Escoffier
Jérôme Monnot
Vangelis Th. Paschos
Mingyu Xiao
Publikationsdatum
01.02.2015
Verlag
Springer US
Erschienen in
Theory of Computing Systems / Ausgabe 2/2015
Print ISSN: 1432-4350
Elektronische ISSN: 1433-0490
DOI
https://doi.org/10.1007/s00224-014-9549-5

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