We study multiplayer stochastic multi-armed bandit problems in which the players cannot communicate, and if two or more players pull the same arm, a collision occurs and the involved players receive zero reward. We consider two feedback models: a model in which the players can observe whether a collision has occurred, and a more difficult setup when no collision information is available. We give the first theoretical guarantees for the second model: an algorithm with a logarithmic regret, and an algorithm with a square-root regret type that does not depend on the gaps between the means. For the first model, we give the first square-root regret bounds that do not depend on the gaps. Building on these ideas, we also give an algorithm for reaching approximate Nash equilibria quickly in stochastic anti-coordination games.

该研究探讨了多人随机多臂赌博问题，其中玩家不能相互通信，且如果两个或两个以上的玩家拉动同一臂，就会发生碰撞并且涉及到的玩家将不会收到奖励，在此研究中，作者提出了两个反馈模型，即一种可以观察到碰撞是否发生和一种更难的模型，即没有碰撞信息。作者提出了一个算法可以实现对于后者的对数后悔度，以及一个不依赖于平均数之间差距的平方根后悔度型算法。对于前一模型，作者给出了第一个不依赖于差距的深度后悔度。基于这些想法，作者还提出了一种在随机反~协调博弈中快速达成近似纳什均衡的算法。

不观测冲突信息的多人赌博机