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- W2001647405 abstract "We analyze the complexity of computing pure strategy Nash equilibria (PSNE) inn symmetric games with a fixed number of actions, where the utilities are compactly represented. Such a representation is able to describe symmetric games whose number of players is exponential in the representation size. We show that in the general case, where utility functions are represented as arbitrary circuits, the problem of deciding the existence of PSNE is NP-complete. For the special case of games with two actions, there always exist a PSNE and we give a polynomial algorithm for finding one. We then focus on a natural representation of utility as piecewise-linear functions, and show that such a representation has nice computational properties. In particular, we give polynomial-time algorithms to count the number of PSNE (thus deciding if such an equilibrium exists) and to find a sample PSNE, when one exists." @default.
- W2001647405 created "2016-06-24" @default.
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- W2001647405 date "2010-05-14" @default.
- W2001647405 modified "2023-09-25" @default.
- W2001647405 title "Symmetric games with piecewise linear utilities" @default.
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- W2001647405 doi "https://doi.org/10.1145/1807406.1807447" @default.
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