Deciding the Winner in Parity Games Is in UP ∩ co-UP
نویسنده
چکیده
We observe that the problem of deciding the winner in mean payoff games is in the complexity class UP ∩ co-UP. We also show a simple reduction from parity games to mean payoff games. From this it follows that deciding the winner in parity games and the modal μ-calculus model checking are in UP ∩ co-UP.
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