Metrics for Markov Decision Processes with Infinite State Spaces
Abstract
Metrics for measuring state similarity in MDPs with infinite continuous state spaces provide a stable framework for planning and approximation, showing continuous variation of optimal value functions with respect to these metrics.
We present metrics for measuring state similarity in Markov decision processes (MDPs) with infinitely many states, including MDPs with continuous state spaces. Such metrics provide a stable quantitative analogue of the notion of bisimulation for MDPs, and are suitable for use in MDP approximation. We show that the optimal value function associated with a discounted infinite horizon planning task varies continuously with respect to our metric distances.
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