paper

Measuring Permissiveness in Parity Games: Mean-Payoff Parity Games Revisited

arXiv:1102.3615 · doi:10.1007/978-3-642-24372-1_11

Abstract

We study nondeterministic strategies in parity games with the aim of computing a most permissive winning strategy. Following earlier work, we measure permissiveness in terms of the average number/weight of transitions blocked by the strategy. Using a translation into mean-payoff parity games, we prove that the problem of computing (the permissiveness of) a most permissive winning strategy is in NP intersected coNP. Along the way, we provide a new study of mean-payoff parity games. In particular, we prove that the opponent player has a memoryless optimal strategy and give a new algorithm for solving these games.

30 pages, revised version

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