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Almost Exact Recovery in Label Spreading

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In semi-supervised graph clustering setting, an expert provides cluster membership of few nodes. This little amount of information allows one to achieve high accuracy clustering using efficient computational procedures. Our main goal is to provide a theoretical justification why the graph-based semi-supervised learning works very well. Specifically, for the Stochastic Block Model in the moderately sparse regime, we prove that popular semi-supervised clustering methods like Label Spreading achieve asymptotically almost exact recovery as long as the fraction of labeled nodes does not go to zero and the average degree goes to infinity.
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hal-02397060 , version 1 (06-12-2019)



Konstantin Avrachenkov, Maximilien Dreveton. Almost Exact Recovery in Label Spreading. WAW 2019 - 16th Workshop on Algorithms and Models for the Web Graph, Jul 2019, Brisbane, Australia. ⟨10.1007/978-3-030-25070-6_3⟩. ⟨hal-02397060⟩
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