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A faster algorithm for betweenness centralityby: U. Brandes
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Notes for this articleBetweenness Centralityは社会ネットワーク解析で大事だけど,計算コストがかかる. 現行のアルゴリズムでは,最速でも時間にしてO(n^3),空間でも(n^2)かかる. 今回の論文で紹介されているアルゴリズムを使えば空間計算量がO(n+m)で,時間計算量にしてO(nm+n^2logn)で計算できる.
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AbstractThe betweenness centrality index is essential in the analysis of social networks, but costly to compute. Currently, the fastest known algorithms require #(n ) time and #(n ) space, where n is the number of actors in the network.
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