Junghyun Lee
Junghyun Lee
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GL-LowPopArt: A Nearly Instance-Wise Minimax-Optimal Estimator for Generalized Low-Rank Trace Regression
We present GL-LowPopArt, a novel Catoni-style estimator for generalized low-rank trace regression. Building on LowPopArt (Jang et al., …
Junghyun Lee
,
Kyoungseok Jang
,
Kwang-Sung Jun
,
Milan Vojnović
,
Se-Young Yun
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Near-Optimal Clustering in Mixture of Markov Chains
We study the problem of clustering T trajectories of length H, each generated by one of K unknown ergodic Markov chains over a finite …
Junghyun Lee
,
Yassir Jedra
,
Alexandre Proutière
,
Se-Young Yun
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TESSAR: Geometry-Aware Active Regression via Dynamic Voronoi Tessellation
Active learning improves training efficiency by selectively querying the most informative samples for labeling. While it naturally fits …
Seong Jin Cho
,
Gwangsu Kim
,
Junghyun Lee
,
Hee Suk Yoon
,
Joshua Tian Jin Tee
,
Chang D. Yoo
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AdaSTaR: Adaptive Data Sampling for Training Self-Taught Reasoners
Self-Taught Reasoners (STaR), synonymously known as Rejection sampling Fine-Tuning (RFT), is an integral part of the training pipeline …
Woosung Koh
,
Wonbeen Oh
,
Jaein Jang
,
MinHyung Lee
,
Hyeongjin Kim
,
Ah Yeon Kim
,
Joonkee Kim
,
Junghyun Lee
,
Taehyeon Kim
,
Se-Young Yun
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Code
Probability-Flow ODE in Infinite-Dimensional Function Spaces
Recent advances in infinite-dimensional diffusion models have demonstrated their effectiveness and scalability in function generation …
Kunwoo Na
,
Junghyun Lee
,
Se-Young Yun
,
Sungbin Lim
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FlickerFusion: Intra-trajectory Domain Generalizing Multi-Agent RL
Multi-agent reinforcement learning has demonstrated significant potential in addressing complex cooperative tasks across various …
Woosung Koh
,
Wonbeen Oh
,
Siyeol Kim
,
Suhin Shin
,
Hyeongjin Kim
,
Jaein Jang
,
Junghyun Lee
,
Se-Young Yun
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Project
A Unified Confidence Sequence for Generalized Linear Models, with Applications to Bandits
We present a unified likelihood ratio-based confidence sequence (CS) for any (self-concordant) generalized linear model (GLM) that is …
Junghyun Lee
,
Se-Young Yun
,
Kwang-Sung Jun
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Code
Poster
Slides
Gradient Descent with Polyak's Momentum Finds Flatter Minima via Large Catapults
Although gradient descent with Polyak’s momentum is widely used in modern machine and deep learning, a concrete understanding of …
Prin Phunyaphibarn
,
Junghyun Lee
,
Bohan Wang
,
Huishuai Zhang
,
Chulhee Yun
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Poster
Slides
Querying Easily Flip-flopped Samples for Deep Active Learning
Proposes a new active learning approach by proposing a new uncertainty measure called the least disagree metric, as well as its efficient estimator, which is proven to be asymptotically consistent. This is then combined with seeding to become a new active learning algorith, LDM-S, which is shown to outperform existing approaches across various architectures and datasets.
Seong Jin Cho
,
Gwangsu Kim
,
Junghyun Lee
,
Jinwoo Shin
,
Chang D. Yoo
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Improved Regret Bounds of (Multinomial) Logistic Bandits via Regret-to-Confidence-Set Conversion
Logistic bandit is a ubiquitous framework of modeling users’ choices, e.g., click vs. no click for advertisement recommender …
Junghyun Lee
,
Se-Young Yun
,
Kwang-Sung Jun
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