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Type of publication:Inproceedings
Entered by:
TitleAn Optimization Approach for Approximate Nash Equilibria
Bibtex cite IDRACTI-RU1-2007-106
Booktitle Workshop on Internet and Network Economics (WINE 2007)
Series Lecture Notes in Computer Science
Year published 2007
Month December
Volume 4858/2007
Pages 42-56
Publisher Springer Berlin / Heidelberg
DOI 10.1007/978-3-540-77105-0
In this paper we propose a new methodology for determining approximate Nash equilibria of non-cooperative bimatrix games and, based on that, we provide an efficient algorithm that computes 0.3393- approximate equilibria, the best approximation till now. The methodology is based on the formulation of an appropriate function of pairs of mixed strategies reflecting the maximum deviation of the players˘ payoffs from the best payoff each player could achieve given the strategy chosen by the other. We then seek to minimize such a function using descent procedures. As it is unlikely to be able to find global minima in polynomial time, given the recently proven intractability of the problem, we concentrate on the computation of stationary points and prove that they can be approximated arbitrarily close in polynomial time and that they have the above mentioned approximation property. Our result provides the best  till now for polynomially computable -approximate Nash equilibria of bimatrix games. Furthermore, our methodology for computing approximate Nash equilibria has not been used by others.
Tsaknakis, Haralampos
Spirakis, Paul
fulltext.pdf (main file)
Publication ID332