License: Creative Commons Attribution 3.0 Unported license (CC-BY 3.0)
When quoting this document, please refer to the following
DOI: 10.4230/LIPIcs.CONCUR.2020.39
URN: urn:nbn:de:0030-drops-128513
URL: https://drops.dagstuhl.de/opus/volltexte/2020/12851/
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Kiefer, Stefan ; Mayr, Richard ; Shirmohammadi, Mahsa ; Totzke, Patrick

Strategy Complexity of Parity Objectives in Countable MDPs

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Abstract

We study countably infinite MDPs with parity objectives. Unlike in finite MDPs, optimal strategies need not exist, and may require infinite memory if they do. We provide a complete picture of the exact strategy complexity of ε-optimal strategies (and optimal strategies, where they exist) for all subclasses of parity objectives in the Mostowski hierarchy. Either MD-strategies, Markov strategies, or 1-bit Markov strategies are necessary and sufficient, depending on the number of colors, the branching degree of the MDP, and whether one considers ε-optimal or optimal strategies. In particular, 1-bit Markov strategies are necessary and sufficient for ε-optimal (resp. optimal) strategies for general parity objectives.

BibTeX - Entry

@InProceedings{kiefer_et_al:LIPIcs:2020:12851,
  author =	{Stefan Kiefer and Richard Mayr and Mahsa Shirmohammadi and Patrick Totzke},
  title =	{{Strategy Complexity of Parity Objectives in Countable MDPs}},
  booktitle =	{31st International Conference on Concurrency Theory (CONCUR 2020)},
  pages =	{39:1--39:17},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-160-3},
  ISSN =	{1868-8969},
  year =	{2020},
  volume =	{171},
  editor =	{Igor Konnov and Laura Kov{\'a}cs},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/opus/volltexte/2020/12851},
  URN =		{urn:nbn:de:0030-drops-128513},
  doi =		{10.4230/LIPIcs.CONCUR.2020.39},
  annote =	{Keywords: Markov decision processes, Parity objectives, Levy’s zero-one law}
}

Keywords: Markov decision processes, Parity objectives, Levy’s zero-one law
Collection: 31st International Conference on Concurrency Theory (CONCUR 2020)
Issue Date: 2020
Date of publication: 26.08.2020


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