Papers › Almost exact recovery in noisy semi-supervised learning

Almost exact recovery in noisy semi-supervised learning

29 Jul 2020arXiv:2007.14717archive 2025-07-28

Konstantin Avrachenkov, Maximilien Dreveton

Graph-based semi-supervised learning methods combine the graph structure and labeled data to classify unlabeled data. In this work, we study the effect of a noisy oracle on classification. In particular, we derive the Maximum A Posteriori (MAP) estimator for clustering a Degree Corrected Stochastic Block Model (DC-SBM) when a noisy oracle reveals a fraction of the labels. We then propose an algorithm derived from a continuous relaxation of the MAP, and we establish its consistency. Numerical experiments show that our approach achieves promising performance on synthetic and real data sets, even in the case of very noisy labeled data.

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ClusteringCommunity DetectionStochastic Block Model

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