Approximating the maximum 2- and 3-edge-colorable subgraph problems

Approximating the maximum 2- and 3-edge-colorable subgraph problems
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近似最大 2 边和 3 边可着色子图问题

DOI:
10.1016/j.dam.2009.04.002
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发表时间:
2009
期刊:
Discret. Appl. Math.
影响因子:
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通讯作者:
A. Kosowski
A. Kosowski
中科院分区:
--
文献类型:
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作者:
A. Kosowski

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对于参数k≥2的固定值,最大k-边可着色子图问题是在一个简单图中找到k个边不相交的匹配,目标是最大化所使用的边的总数。已知该问题对于所有k都是APX困难的,但是存在多项式时间近似算法,随着k趋于无穷大,近似比趋于1。在这里,我们提出了改进的近似算法的情况下,k=2和k=3,具有5/6和4/5的近似比,分别。
For a fixed value of a parameter k≥2, the Maximum k-Edge-Colorable Subgraph Problem consists in finding k edge-disjoint matchings in a simple graph, with the goal of maximising the total number of edges used. The problem is known to be APX-hard for all k, but there exist polynomial time approximation algorithms with approximation ratios tending to 1 as k tends to infinity. Herein we propose improved approximation algorithms for the cases of k=2 and k=3, having approximation ratios of 5/6 and 4/5, respectively.