Author

Hyunjun Choi

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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

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