Empirical Q-Value Iteration
Dileep Kalathil, Vivek S. Borkar, Rahul Kumar Jain · Stochastic Systems · 2020
We propose a new simple and natural algorithm for learning the optimal [Formula: see text]-value function of a discounted-cost Markov decision process (MDP) when the transition kernels are unknown. Unlike the classical learning algorithms for MDPs, such as [Formula: see text]-learning and actor-critic algorithms, this algorithm does not depend on a stochastic approximation-based method. We show that our algorithm, which we call the empirical [Formula: see text]-value iteration algorithm, converges to the optimal [Formula: see text]-value function. We also give a rate of convergence or a nonasymptotic sample complexity bound and show that an asynchronous (or online) version of the algorithm will also work. Preliminary experimental results suggest a faster rate of convergence to a ballpark estimate for our algorithm compared with stochastic approximation-based algorithms.