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- W2056597184 abstract "It has been a challenging open problem whether there is a polynomial time approximation algorithm for the VERTEX COVER problem whose approximation ratio is bounded by a constant less than 2. In this paper, we study the VERTEX COVER problem on graphs with perfect matching (shortly, VC-PM). We show that if the VC-PM problem has a polynomial time approximation algorithm with approximation ratio bounded by a constant less than 2, then so does the VERTEX COVER problem on general graphs. Approximation algorithms for VC-PM are developed, which induce improvements over previously known algorithms on sparse graphs. For example, for graphs of average degree 5, the approximation ratio of our algorithm is 1.414, compared with the previously best ratio 1.615 by Halldórsson and Radhakrishnan." @default.
- W2056597184 created "2016-06-24" @default.
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- W2056597184 date "2005-06-01" @default.
- W2056597184 modified "2023-09-25" @default.
- W2056597184 title "On approximating minimum vertex cover for graphs with perfect matching" @default.
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- W2056597184 doi "https://doi.org/10.1016/j.tcs.2004.12.034" @default.
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