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Bing-Hui Liu

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Preprint Oct 2026

Optimal Community Recovery by Spectrally Initialized Variational EM in General Stochastic Block Models

We prove a Chernoff-exponent guarantee for the output of spectrally initialized batch variational EM after a prescribed iteration budget, without assuming global maximization of its variational objective. The iteration repeatedly estimates the entire block probability matrix and community proportions from the same spar...

Bing-Hui Liu, Jiang-Zhou Wang, Man-Chung Yue · 0 citations

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