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arXiv 1302.4347cs.DS
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最大集Packing问题的大邻域局部搜索

Large Neighborhood Local Search for the Maximum Set Packing Problem

Maxim Sviridenko, Justin Ward

摘要:

本文考虑了经典的极大集装箱问题,其中集的基数是由$k$定义的上界。我们展示了如何设计一个多项式时间的局部搜索算法的性能保证$(k+2)/3$的一个变种。该局部搜索算法是更一般的过程的特殊情况,其允许每次迭代交换多达$Θ(\log n)$元素。我们还设计了具有局部间隙$k/3$的问题实例,即使是对于广泛的指数时间局部搜索过程,也可以将$cn$元素交换为常数$c$。这表明我们对这类算法的分析几乎是严密的。

英文摘要:

In this paper we consider the classical maximum set packing problem where set cardinality is upper bounded by $k$. We show how to design a variant of a polynomial-time local search algorithm with performance guarantee $(k+2)/3$. This local search algorithm is a special case of a more general procedure that allows to swap up to $Θ(\log n)$ elements per iteration. We also design problem instances with locality gap $k/3$ even for a wide class of exponential time local search procedures, which can swap up to $cn$ elements for a constant $c$. This shows that our analysis of this class of algorithms is almost tight.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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