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Nash Equilibria in Games over Graphs Equipped with a Communication Mechanism

Authors Patricia Bouyer , Nathan Thomasset

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Author Details

Patricia Bouyer
  • LSV, CNRS, ENS Paris-Saclay, Université Paris-Saclay, France
Nathan Thomasset
  • LSV, ENS Paris-Saclay, CNRS, Université Paris-Saclay, France

Funding

This work has been partly supported by ERC project EQualIS (FP7-308087).

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Patricia Bouyer and Nathan Thomasset. Nash Equilibria in Games over Graphs Equipped with a Communication Mechanism. In 44th International Symposium on Mathematical Foundations of Computer Science (MFCS 2019). Leibniz International Proceedings in Informatics (LIPIcs), Volume 138, pp. 9:1-9:14, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2019) https://doi.org/10.4230/LIPIcs.MFCS.2019.9

Abstract

We study pure Nash equilibria in infinite-duration games on graphs, with partial visibility of actions but communication (based on a graph) among the players. We show that a simple communication mechanism consisting in reporting the deviator when seeing it and propagating this information is sufficient for characterizing Nash equilibria. We propose an epistemic game construction, which conveniently records important information about the knowledge of the players. With this abstraction, we are able to characterize Nash equilibria which follow the simple communication pattern via winning strategies. We finally discuss the size of the construction, which would allow efficient algorithmic solutions to compute Nash equilibria in the original game.

Subject Classification

ACM Subject Classification
  • Theory of computation
  • Theory of computation → Solution concepts in game theory
  • Theory of computation → Verification by model checking
Keywords
  • Multiplayer games
  • Nash equilibria
  • partial information

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References

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