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Author

Soumyadeep Dutta

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Jul 2026

Price of Fairness in Bandits: A Tight Minimax Characterization

This work introduces UCB-HARE (Harmonic Anchored Rank Exploration), which replaces uniform exploration with an inverse-weighted harmonic rank schedule protected by a certified positive-mean anchor, and proves an algorithm-independent lower bound of $\sigma(\sigma\sqrt{k^{\max(1,q)}/T})$; for $q>1$, this shows that the...

Dhruv Sarkar, Soumyadeep Dutta, Sayak Ray Chowdhury · 1 citation

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