Exploring the boundary of half-positionality

  • Authors:
  • Alessandro Bianco;Marco Faella;Fabio Mogavero;Aniello Murano

  • Affiliations:
  • Università degli Studi di Napoli "Federico II", Napoli, Italy;Università degli Studi di Napoli "Federico II", Napoli, Italy;Università degli Studi di Napoli "Federico II", Napoli, Italy;Università degli Studi di Napoli "Federico II", Napoli, Italy

  • Venue:
  • Annals of Mathematics and Artificial Intelligence
  • Year:
  • 2011

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Abstract

Half positionality is the property of a language of infinite words to admit positional winning strategies, when interpreted as the goal of a two-player game on a graph. Such problem applies to the automatic synthesis of controllers, where positional strategies represent efficient controllers. As our main result, we present a novel sufficient condition for half positionality, more general than what was previously known. Moreover, we compare our proposed condition with several others, proposed in the recent literature, outlining an intricate network of relationships, where only few combinations are sufficient for half positionality.