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Author

Taehyun Hwang

4 papers indexed here

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#machine learning Preprint Oct 2026

Block Optimism for Nonstationary Bandits with Latent Linear Dynamics

This work proves a regret bound of order $\tilde{O}(\sqrt T)$, significantly improving over the previous $\tilde{O}(T^{2/3})$ guarantee, and is the first $\tilde{O}(\sqrt T)$ regret guarantee for latent linear-dynamics bandits with bilinear reward observations and an open-loop action-sequence benchmark.

Taehyun Hwang, Hyunjun Choi, Heesang Ann et al. · 0 citations

Diversified Multinomial Logit Contextual Bandits

A UCB-based algorithm that constructs assortments item-wise by maximizing optimistic marginal gains, avoids black-box optimization oracles, and offers a statistically and computationally efficient solution for diversity-aware assortment optimization under uncertainty is proposed.

Heesang Ann, Taehyun Hwang, Min-hwan Oh · 0 citations
#machine learning Preprint Sep 2026

Linear Ensemble Sampling with Smaller Ensembles

This work proposes an ensemble sampling algorithm that refreshes the ensemble only when the regularized Gram matrix changes substantially and achieves the sharper regret bound, and is the first ensemble-sampling guarantee that simultaneously recovers both canonical regret scalings known for randomized linear bandit alg...

Taehyun Hwang, Min-hwan Oh · 0 citations
Preprint Aug 2026

Generalized Linear Bandits with Memory

This analysis provides a unified treatment of memory-induced non-stationarity and nonlinear link functions, while ensuring that the leading regret term is independent of the curvature of the link function.

Heesang Ann, Hyunjun Choi, Taehyun Hwang et al. · 1 citation

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