Junghyun Lee
Junghyun Lee
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Fair Streaming Principal Component Analysis: Statistical and Algorithmic Viewpoint
Proposes a framework for performing fair PCA in memory limited, streaming setting. Sample complexity results and empirical discussions show the superiority of our approach compared to the existing approaches.
Junghyun Lee
,
Hanseul Cho
,
Se-Young Yun
,
Chulhee Yun
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Flooding with Absorption: An Efficient Protocol for Heterogeneous Bandits over Complex Networks
A novel problem setting where heterogeneous multi-agent bandits collaborate over a network to minimize their group regret. To deal with the high communication complexity of the classic flooding protocol combined with UCB, a new network protocol called Flooding with Absorption (FwA) is proposed. Theoretical and empirical analyses are provded for flooding and FwA, showing the efficacy of our proposed FwA.
Junghyun Lee
,
Laura Schmid
,
Se-Young Yun
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Nearly Optimal Latent State Decoding in Block MDPs
First theoretical analysis of model estimation and reward-free RL of block MDP, without resorting to function approximation frameworks. Lower bounds and algorithms with near-optimal upper bound are provided.
Yassir Jedra
,
Junghyun Lee
,
Alexandre Proutière
,
Se-Young Yun
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Fast and Efficient MMD-based Fair PCA via Optimization over Stiefel Manifold
Proposes a new MMD-based definition of fairness for PCA, then formulate fair PCA as an optimization over the Stiefel manifold. Various theoretical and empirical discussions show the superiority of our approach compared to the existing approach (Olfat & Aswani, AAAI'19).
Junghyun Lee
,
Gwangsu Kim
,
Matt Olfat
,
Mark Hasegawa-Johnson
,
Chang D. Yoo
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Preliminary Evaluation of SWAY in Permutation Decision Space via a Novel Euclidean Embedding
Extend SWAY (Chen et al., 2016) to the space of permutations by proposing a new Euclidean embedding of permutations.
Junghyun Lee
,
Chani Jung
,
Yoo Hwa Park
,
Dongmin lee
,
Juyeon Yoon
,
Shin Yoo
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