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Transfer Learning for Contextual Multi-armed Bandits


Nov 22, 2022
Changxiao Cai, T. Tony Cai, Hongzhe Li

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Minimax Estimation of Linear Functions of Eigenvectors in the Face of Small Eigen-Gaps


Apr 07, 2021
Gen Li, Changxiao Cai, Yuantao Gu, H. Vincent Poor, Yuxin Chen

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Is Q-Learning Minimax Optimal? A Tight Sample Complexity Analysis


Mar 16, 2021
Gen Li, Changxiao Cai, Yuxin Chen, Yuantao Gu, Yuting Wei, Yuejie Chi

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* v2 added a matching lower bound, and removed the finite-horizon setting for brevity 

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Tightening the Dependence on Horizon in the Sample Complexity of Q-Learning


Feb 12, 2021
Gen Li, Changxiao Cai, Yuxin Chen, Yuantao Gu, Yuting Wei, Yuejie Chi

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Uncertainty quantification for nonconvex tensor completion: Confidence intervals, heteroscedasticity and optimality


Jun 15, 2020
Changxiao Cai, H. Vincent Poor, Yuxin Chen

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* Accepted in part to ICML 2020 

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Nonconvex Low-Rank Symmetric Tensor Completion from Noisy Data


Nov 11, 2019
Changxiao Cai, Gen Li, H. Vincent Poor, Yuxin Chen

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Subspace Estimation from Unbalanced and Incomplete Data Matrices: $\ell_{2,\infty}$ Statistical Guarantees


Oct 09, 2019
Changxiao Cai, Gen Li, Yuejie Chi, H. Vincent Poor, Yuxin Chen

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