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Abstract:
The notion of penalty has been introduced into many combinatorial optimization models. In this paper, we consider the submodular vertex cover problems with linear and submodular penalties, which are two variants of the submodular vertex cover problem where not all the edges are required to be covered by a vertex cover, and the uncovered edges are penalized. The problem is to determine a vertex subset to cover some edges and penalize the uncovered edges such that the total cost including covering and penalty is minimized. To overcome the difficulty of implementing the primal-dual framework directly, we relax the two dual programs to slightly weaker versions. We then present two primal dual approximation algorithms with approximation ratios of 2 and 4, respectively. (C) 2016 Elsevier B.V. All rights reserved.
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Source :
THEORETICAL COMPUTER SCIENCE
ISSN: 0304-3975
Year: 2016
Volume: 630
Page: 117-125
1 . 1 0 0
JCR@2022
ESI Discipline: COMPUTER SCIENCE;
ESI HC Threshold:167
CAS Journal Grade:4
Cited Count:
WoS CC Cited Count: 17
SCOPUS Cited Count: 19
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 5
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