Title
Error bounds for constant step-size Q-learning.
Abstract
We provide a bound on the first moment of the error in the Q-function estimate resulting from fixed step-size algorithms applied to finite state-space, discounted reward Markov decision problems. Motivated by Tsitsiklis’ proof for the decreasing step-size case, we decompose the Q-learning update equations into a dynamical system driven by a noise sequence and another dynamical system whose state variable is the Q-learning error, i.e., the difference between the true Q-function and the estimate. A natural persistence of excitation condition allows us to sample the system periodically and derive a simple scalar difference equation from which the convergence properties and bounds on the error of the Q-learning algorithm can be derived.
Year
DOI
Venue
2012
10.1016/j.sysconle.2012.08.014
Systems & Control Letters
Keywords
Field
DocType
Q-learning,Markov decision processes,Stochastic approximation
Differential equation,Mathematical optimization,Markov chain,Q-learning,Markov decision process,Moment (mathematics),State variable,Stochastic approximation,Dynamical system,Mathematics
Journal
Volume
Issue
ISSN
61
12
0167-6911
Citations 
PageRank 
References 
3
0.62
4
Authors
2
Name
Order
Citations
PageRank
Carolyn L. Beck140160.19
Srikant, R.26868544.90