Theoretical computer science · Oct 6, 2026

Quasipolynomial algorithms for mean-payoff, stochastic and parity games

Gives deterministic algorithms using 2O((log⁡(L+2))2)2^{O((\log(L+2))^2)} bit operations, for complete binary input length L, for ordinary mean-payoff games and two separate extensions. They compute exact values and optimal positional strategies in ordinary games, the nonnegative expectation-of-liminf value set in turn-based stochastic games, and the winning set for nonnegative liminf mean payoff conjoined with parity. Signed rewards, rational chance probabilities, and parity priorities are unrestricted and binary-encoded.

Contributors

Unreleased OpenAI model

AI systems: Unreleased OpenAI model

Sources