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arXiv 1909.08540cs.LGcs.GTcs.MAstat.ML
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具有相关支付的未知博弈中的无悔学习

No-Regret Learning in Unknown Games with Correlated Payoffs

ETH Zürich(苏黎世联邦理工学院)

Pier Giuseppe Sessa, Ilija Bogunovic, Maryam Kamgarpour, Andreas Krause

摘要:

我们考虑的问题,学习玩一个重复的多智能体游戏与未知的奖励函数。单人在线学习算法在提供完全信息反馈时获得强遗憾边界,不幸的是,这在许多现实世界的场景中是不可用的。仅仅是Bandit反馈,即,仅观察所选动作的结果产生了实质上更差的性能。在本文中,我们考虑了一个自然的模型,除了获得奖励的嘈杂测量,玩家还可以观察对手的行动。这个反馈模型,再加上奖励函数的规律性假设,使我们能够利用高斯过程(GP)的不同游戏结果之间的相关性。我们提出了一种新的基于置信区间的强盗算法GP-MW,它利用GP模型的奖励函数和运行的乘法权重(MW)的方法。我们得到了新的依赖于核的遗憾界,可与已知的界限在全信息设置,同时大大改善现有的强盗的结果。我们实验证明了GP-MW在随机矩阵游戏中的有效性,以及现实世界中的交通路由和电影推荐问题。在我们的实验中,GP-MW始终优于几个基线,而其性能通常与能够获得完整信息反馈的方法相当。

英文摘要:

We consider the problem of learning to play a repeated multi-agent game with an unknown reward function. Single player online learning algorithms attain strong regret bounds when provided with full information feedback, which unfortunately is unavailable in many real-world scenarios. Bandit feedback alone, i.e., observing outcomes only for the selected action, yields substantially worse performance. In this paper, we consider a natural model where, besides a noisy measurement of the obtained reward, the player can also observe the opponents' actions. This feedback model, together with a regularity assumption on the reward function, allows us to exploit the correlations among different game outcomes by means of Gaussian processes (GPs). We propose a novel confidence-bound based bandit algorithm GP-MW, which utilizes the GP model for the reward function and runs a multiplicative weight (MW) method. We obtain novel kernel-dependent regret bounds that are comparable to the known bounds in the full information setting, while substantially improving upon the existing bandit results. We experimentally demonstrate the effectiveness of GP-MW in random matrix games, as well as real-world problems of traffic routing and movie recommendation. In our experiments, GP-MW consistently outperforms several baselines, while its performance is often comparable to methods that have access to full information feedback.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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