Reasoning about joint action and coalitional ability in Kn with intersection

  • Authors:
  • Thomas Ågotnes;Natasha Alechina

  • Affiliations:
  • Department of Information Science and Media Studies, University of Bergen, Norway;School of Computer Science, University of Nottingham, UK

  • Venue:
  • CLIMA'11 Proceedings of the 12th international conference on Computational logic in multi-agent systems
  • Year:
  • 2011

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Abstract

In this paper we point out that standard PDL-like logics with intersection are useful for reasoning about game structures. In particular, they can express coalitional ability operators known from coalition logic and ATL. An advantage of standard, normal, modal logics is a well understood theoretical foundation and the availability of tools for automated verification and reasoning. We study a minimal variant, multi-modal K with intersection of modalities, interpreted over models corresponding to game structures. There is a restriction: we consider only game structures that are injective. We give a complete axiomatisation of the corresponding models, as well as a characterisation of key complexity problems. We also prove a representation theorem identifying the effectivity functions corresponding to injective games.