Minimax Rates for Robust Community Detection
Minimax Rates for Robust Community Detection
复制标题
用于稳健社区检测的极小极大率
DOI:
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发表时间:
2022
期刊:
影响因子:
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通讯作者:
Ankur Moitra
中科院分区:
文献类型:
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作者:
Allen Liu;Ankur Moitra
In this work, we study the problem of community detection in the stochastic block model with adversarial node corruptions. Our main result is an efficient algorithm that can tolerate an $epsilon$-fraction of corruptions and achieves error $O(epsilon)+e^{-frac{C}{2}(1pm o(1))}$ where $C=(sqrt{a}-sqrt{b})^{2}$ is the signal-to-noise ratio and $a/n$ and $b/n$ are the inter-community and intra-community connection probabilities respectively. These bounds essentially match the minimax rates for the SBM without corruptions. We also give robust algorithms for $mathbb{Z}_{2}$-synchronization. At the heart of our algorithm is a new semidefinite program that uses global information to robustly boost the accuracy of a rough clustering. Moreover, we show that our algorithms are doubly-robust in the sense that they work in an even more challenging noise model that mixes adversarial corruptions with unbounded monotone changes, from the semi-random model.
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DOI:
10.1214/15-aap1145
发表时间:
2013-09
期刊:
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影响因子:
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作者:
Elchanan Mossel;Joe Neeman;A. Sly
通讯作者:
Elchanan Mossel;Joe Neeman;A. Sly
DOI:
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发表时间:
2017-03
期刊:
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影响因子:
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作者:
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通讯作者:
Ilias Diakonikolas;Gautam Kamath;D. Kane;Jerry Li;Ankur Moitra;Alistair Stewart
影响因子:
2.5
作者:
Fei, Yingjie;Chen, Yudong
通讯作者:
Chen, Yudong
DOI:
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发表时间:
2021-11
期刊:
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影响因子:
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作者:
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通讯作者:
Jayadev Acharya;Ayush Jain;Gautam Kamath;A. Suresh;Huanyu Zhang
DOI:
10.1145/3519935.3519953
发表时间:
2022
期刊:
Symposium on Theory of Computation
影响因子:
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作者:
Bakshi, Ainesh;Diakonikolas, Ilias;Jia, He;Kane, Daniel M.;Kothari, Pravesh K.;Vempala, Santosh S.
通讯作者:
Vempala, Santosh S.