Acta mathematica scientia,Series A ›› 2022, Vol. 42 ›› Issue (2): 594-604.

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Asymptotic Optimality of Quantized Stationary Policies in Continuous-Time Markov Decision Processes with Polish Spaces

Xiao Wu1,Yinying Kong2,*(),Zhenbin Guo3   

  1. 1 School of Mathematics and Statistics, Zhaoqing University, Guangdong Zhaoqing 526061
    2 School of Intelligence Financial & Accounting Management, Guangdong University of Finance and Economics, Guangzhou 510320
    3 Development Research Center, GF Securities Co Ltd, Shanghai 200120
  • Received:2021-03-04 Online:2022-04-26 Published:2022-04-18
  • Contact: Yinying Kong E-mail:kongcoco@hotmail.com
  • Supported by:
    the NSFC(11961005);the Opening Project of Guangdong Province Key Laboratory of Computational Science at Sun Yat-sen University(2021021);the Guangdong University (New Generation Information Technology) Key Field Project(2020ZDZX3019);the Guangzhou Science and Technology Plan Project(202102080420)

Abstract:

In this paper, we study the asymptotic optimality of the quantized stationary policies for continuous-time Markov decision processes (CTMDPs) with Polish space and state-dependent discount factors. Firstly, the existence and uniqueness of the discounted optimal equation (DOE) and its solution are established. Secondly, the existence of the optimal deterministic stationary policies is proved under appropriate conditions. In addition, in order to discretize the action space, a series of quantization policies are constructed to approximate the optimal stationary policies of the discounted CTMDPs in general state (Polish) space by using the policies in finite action space. Finally, an example is given to illustrate the asymptotic approximation results of this paper.

Key words: Continuous-time Markov decision processes, State-dependent discount factors, Discounted criterion, Quantized stationary policies, Asymptotic optimality

CLC Number: 

  • O211.6
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