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New Bandit Algorithm Slashes Regret with Gossip Communication

Researchers have developed a new approach to distributed adversarial bandits, improving upon previous regret bounds. The method utilizes a black-box reduction to bandits with delayed feedback, requiring only gossip-based communication among agents. This new algorithm achieves a significantly better upper bound than prior work and is complemented by a matching lower bound, demonstrating the problem's decomposition into communication and bandit costs. The framework is also versatile, yielding bounds for distributed linear bandits with reduced communication overhead. AI

RANK_REASON This is a research paper published on arXiv detailing a new algorithm for distributed adversarial bandits. [lever_c_demoted from research: ic=1 ai=1.0]

Read on arXiv cs.LG →

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COVERAGE [1]

  1. arXiv cs.LG TIER_1 English(EN) · Hao Qiu, Mengxiao Zhang, Nicol\`o Cesa-Bianchi ·

    Near-Optimal Regret for Distributed Adversarial Bandits: A Black-Box Approach

    arXiv:2602.06404v2 Announce Type: replace Abstract: We study distributed adversarial bandits, where $N$ agents cooperate to minimize the global average loss while observing only their own local losses. We show that the minimax regret for this problem is $\tilde{\Theta}(\sqrt{(\rh…