Author

Tuan Quang Dam

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#artificial intelligence Preprint Oct 2026

Nearly Optimal Fixed-Confidence Best-Arm Identification with 1-Bit Feedback

We study fixed-confidence best-arm identification under strict 1-bit feedback constraints. At each round, the learner selects an arm and a query set, and receives only a single bit indicating whether the sampled reward belongs to that set. We consider a distribution-free finite-variance setting with arm-wise localizati...

Khang A. Luong, Sơn Thái Đinh, Ho-Ang Ta et al. · 0 citations

#machine learning Preprint Oct 2026

Sharp Non-Asymptotic Analysis of the Penalized Challenger in $\beta$-EB-TCI for Bernoulli Bandits

Top-two algorithms are simple and effective for fixed-confidence best-arm identification, but their sharp non-asymptotic behavior is still not well understood. We study this problem for Bernoulli bandits through $\beta$-EB-TCI, the empirical-best top-two rule of Jourdan et al., whose challenger is chosen using a Bernou...

N. Nguyen, Tuan Quang Dam · 0 citations