The regularity lemma and approximation schemes for dense problems
The regularity lemma and approximation schemes for dense problems
复制标题
稠密问题的正则引理和近似方案
DOI:
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发表时间:
1996
期刊:
影响因子:
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通讯作者:
R. Kannan
中科院分区:
文献类型:
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作者:
A. Frieze;R. Kannan
There are two main contributions of the present paper. In the first, we use the constructive version of the Regularity Lemma to give directly simple polynomial time approximation schemes for several graph "subdivision" problems in dense graphs including the Max Cut problem, the Graph Bisection problem, the Min l-way cut problem and Graph Separator problem. Arora, Karger and Karpinski (1992) gave the first PTASs for these problems whose running time is O(n/sup o(1/e2)/). Our PTASs have running time where the exponent of n is a constant independent of e. The central point here is that the Regularity Lemma provides an explanation of why these Max-SNP hard problems turn out to be easy in dense graphs. We also give a simple PTAS for dense versions of a special case of the Quadratic Assignment Problem (QAP).