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On the Succinctness of Alternating Parity Good-For-Games Automata

Authors Udi Boker, Denis Kuperberg , Karoliina Lehtinen , Michał Skrzypczak

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Author Details

Udi Boker
  • Interdisciplinary Center (IDC) Herzliya, Israel
Denis Kuperberg
  • CNRS, LIP, École Normale Supérieure, Lyon, France
Karoliina Lehtinen
  • University of Liverpool, UK
Michał Skrzypczak
  • Institute of Informatics, University of Warsaw, Poland

Funding

  • Boker, Udi: Israel Science Foundation grant 1373/16.
  • Lehtinen, Karoliina: This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 892704.
  • Skrzypczak, Michał: Supported by Polish National Science Centre grant no. 2016/21/D/ST6/00491.

Cite As Get BibTex

Udi Boker, Denis Kuperberg, Karoliina Lehtinen, and Michał Skrzypczak. On the Succinctness of Alternating Parity Good-For-Games Automata. In 40th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2020). Leibniz International Proceedings in Informatics (LIPIcs), Volume 182, pp. 41:1-41:13, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2020) https://doi.org/10.4230/LIPIcs.FSTTCS.2020.41

Abstract

We study alternating parity good-for-games (GFG) automata, i.e., alternating parity automata where both conjunctive and disjunctive choices can be resolved in an online manner, without knowledge of the suffix of the input word still to be read.
We show that they can be exponentially more succinct than both their nondeterministic and universal counterparts. Furthermore, we present a single exponential determinisation procedure and an Exptime upper bound to the problem of recognising whether an alternating automaton is GFG.
We also study the complexity of deciding "half-GFGness", a property specific to alternating automata that only requires nondeterministic choices to be resolved in an online manner. We show that this problem is PSpace-hard already for alternating automata on finite words.

Subject Classification

ACM Subject Classification
  • Theory of computation → Logic and verification
Keywords
  • Good for games
  • history-determinism
  • alternation

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References

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