Trembling hand perfection is NP-hard
Peter Bro Miltersen

TL;DR
Deciding whether a pure-strategy Nash equilibrium is trembling hand perfect in a three-player game with integer payoffs is computationally NP-hard, indicating significant complexity in equilibrium refinement verification.
Contribution
This paper proves that verifying trembling hand perfection for pure-strategy Nash equilibria in three-player games is NP-hard, highlighting computational challenges in equilibrium analysis.
Findings
NP-hardness of trembling hand perfection decision problem
Implications for computational game theory
Complexity results for equilibrium refinement verification
Abstract
It is NP-hard to decide if a given pure-strategy Nash equilibrium of a given three-player game in strategic form with integer payoffs is trembling hand perfect.
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Taxonomy
TopicsGame Theory and Applications · Economic theories and models · Game Theory and Voting Systems
