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Global Optimality without Mixing Time Oracles in Average-reward RL via Multi-level Actor-Critic
March 19, 2024, 4:42 a.m. | Bhrij Patel, Wesley A. Suttle, Alec Koppel, Vaneet Aggarwal, Brian M. Sadler, Amrit Singh Bedi, Dinesh Manocha
cs.LG updates on arXiv.org arxiv.org
Abstract: In the context of average-reward reinforcement learning, the requirement for oracle knowledge of the mixing time, a measure of the duration a Markov chain under a fixed policy needs to achieve its stationary distribution-poses a significant challenge for the global convergence of policy gradient methods. This requirement is particularly problematic due to the difficulty and expense of estimating mixing time in environments with large state spaces, leading to the necessity of impractically long trajectories for …
abstract actor actor-critic arxiv challenge context convergence cs.lg distribution global knowledge markov oracle policy reinforcement reinforcement learning type via
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