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A simple and fast parallel coloring for distance-hereditary graphs

机译:距离遗传图的简单快速并行着色

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摘要

In the literature, there are quite a few sequential and parallel algorithms to solve problems on distance-hereditary graphs. Two well-known classes of graphs, which contain trees and cographs, belong to distance-hereditary graphs. We consider the vertex-coloring problem on distance-hereditary graphs. Let T/sub d/(|V|, |E|) and P/sub d/d(|V|, |E|) denote the time and processor complexities, respectively, required to construct a decomposition tree representation of a distance-hereditary graph G=(V,E) on a PRAM model M/sub d/. Our algorithm runs in O(T/sub d/(|V|, |E|)+log|V|) time using O(P/sub d/(|V|, |E|)+|V|/log|V|) processors on M/sub d/. The best known result for constructing a decomposition tree needs O(log/sup 2/ |V|) time using O(|V|+|E|) processors on a CREW PRAM. If a decomposition tree is provided as input, we solve the problem in O(log |V|) time using O(|V|/log |V|) processors on an EREW PRAM. To the best of our knowledge, there is no parallel algorithm for this problem on distance-hereditary graphs.
机译:在文献中,有很多顺序和并行算法可以解决距离遗传图上的问题。包含树和图形的两类众所周知的图形属于距离遗传图形。我们考虑距离遗传图上的顶点着色问题。令T / sub d /(| V |,| E |)和P / sub d / d(| V |,| E |)分别表示构造距离的分解树表示所需要的时间和处理器复杂度PRAM模型M / sub d /上的遗传图G =(V,E)。我们的算法使用O(P / sub d /(| V |,| E |)+ | V | / log在O(T / sub d /(| V |,| E |)+ log | V |)时间中运行| / V |)处理器位于M / sub d /。在CREW PRAM上使用O(| V | + | E |)处理器,构造分解树的最著名结果需要O(log / sup 2 / | V |)时间。如果提供分解树作为输入,我们可以在EREW PRAM上使用O(| V | / log | V |)处理器在O(log | V |)时间内解决问题。据我们所知,距离遗传图没有针对此问题的并行算法。

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