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A Simple and Fast Min-cut Algorithm

机译:一种简单快速的最小剪切算法

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摘要

We present an algorithm which calculates a minimum cut and its weight in an undirected graph with nonnegative real edge weights, n vertices and m edges, in time O((max (log n, min (m/n,δ_G/ε))n~2), where ε is the minimal edge weight, and δ_G the minimal weighted degree. For integer edge weights this time is further improved to O(δ_Gn~2) and O(λ_Gn~2). In both cases these bounds are improvements of the previously known best bounds of deterministic algorithms. These were O(nm + log nn~2) for real edge weights and O(nM + n~2) and O(M + λ_Gn~2) for integer weights, where M is the sum of all edge weights.
机译:我们介绍了一种算法,其在时间o(最多(max(min(min(m / n,Δ_g/ε))n个中,n个顶点和m边缘,n个顶点和m边缘计算最小切割及其重量〜2),其中ε是最小的边缘重量,并且Δ_g最小的加权程度。对于整数边缘权重,此时间进一步改善为O(Δ_gn〜2)和o(λ_gn〜2)。在这两种情况下,这些界限都是改进在先前已知的确定性算法的最佳界限。这些是用于整数重量的实际边缘权重和O(nm + n〜2)和O(m +λ_gn〜2)的O(nm + log nn〜2),其中m是所有边缘权重的总和。

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