Computational Aspects of Uncertainty Profiles and Angel-Daemon Games

  • Authors:
  • Joaquim Gabarro;Alina Garcia;Maria Serna

  • Affiliations:
  • ALBCOM Research Group, Universitat Politècnica de Catalunya, Barcelona, Spain 08034;ALBCOM Research Group, Universitat Politècnica de Catalunya, Barcelona, Spain 08034;ALBCOM Research Group, Universitat Politècnica de Catalunya, Barcelona, Spain 08034

  • Venue:
  • Theory of Computing Systems
  • Year:
  • 2014

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Abstract

We analyze the complexity of equilibria problems for a class of strategic zero-sum games, called angel-daemon games. Those games were introduced to asses the performance of the execution of a web orchestration on a moderate faulty or under stress environment. Angel-daemon games are a natural example of zero-sum games whose representation is naturally succinct. We show that the problems of deciding the existence of a pure Nash equilibrium or of a dominant strategy for a given player are ${\Sigma}^{p}_{2}$-complete. Furthermore, computing the value of an angel-daemon game is EXP-complete. Thus, our results match the already known classification of the corresponding problems for the generic families of succinctly represented games with exponential number of actions.