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首页> 外文期刊>SIAM Journal on Discrete Mathematics >FINDING A MAXIMUM INDEPENDENT SET IN A SPARSE RANDOM GRAPH
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FINDING A MAXIMUM INDEPENDENT SET IN A SPARSE RANDOM GRAPH

机译:在稀疏随机图中找到最大独立集

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摘要

We consider the problem of finding a maximum independent set in a random graph. The random graph G, which contains n vertices, is modeled as follows. Every edge is included independently with probability d, where d is some sufficiently large constant. Thereafter, for some constant α, a subset I of αn vertices is chosen at random, and all edges within this subset are removed. In this model, the planted independent set I is a good approximation for the maximum independent set I_(max), but both I I_(max) and I_(max) I are likely to be nonempty. We present a polynomial time algorithm that with high probability (over the random choice of random graph G and without being given the planted independent set I) finds the maximum independent set in G when α ≥ (c_o/d)~(1/2), where c_o is some sufficiently large constant independent of d.
机译:我们考虑在随机图中找到最大独立集的问题。包含n个顶点的随机图G的建模如下。每个边缘以概率d / n独立包含,其中d是一些足够大的常数。此后,对于某个常数α,随机选择一个αn个顶点的子集I,并删除该子集中的所有边。在此模型中,种植的独立集I是最大独立集I_(max)的良好近似值,但是I I_(max)和I_(max)I都可能是非空的。我们提出了一种多项式时间算法,当α≥(c_o / d)〜(1/2)时,它有很高的概率(在随机图G的随机选择上,并且没有给出种植的独立集I)在G中找到最大独立集。 ,其中c_o是一些独立于d的足够大的常数。

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