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arXiv 2406.17482cs.GTcs.FLcs.LO
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定量博弈中步数计数的威力

The Power of Counting Steps in Quantitative Games

Sougata Bose, Rasmus Ibsen-Jensen, David Purser, Patrick Totzke, Pierre Vandenhove

AI总结:

该研究聚焦无限图上定量博弈的策略复杂度,证明有限分支场景下部分上极限收益目标可用步计数器类策略实现获胜,同时指出部分下极限总收益目标此类策略不足,完善了波莱尔层级内经典定量目标的策略复杂度结论。

摘要:

我们研究在图上进行的无限时长确定性博弈,重点关注定量目标的策略复杂度。已知这类博弈在有限图上存在最优无记忆策略,但在无限图上通常需要无限记忆策略。我们针对无限图上的平均收益(mean-payoff)和总收益(total-payoff)目标的策略复杂度,给出了新的下界与上界,重点研究步计数器策略(有时称为马尔可夫策略)是否足以实现获胜策略。具体而言,我们证明在有限分支竞技场上,上极限平均收益和总收益目标的三种变体都存在基于步计数器,或基于步计数器加额外一位记忆的获胜策略。反之,我们证明对于某些下极限总收益目标,仅借助步计数器和有限记忆的策略是不够的。对于步计数器策略而言,这一结果解决了波莱尔层级第二层以内所有经典定量目标的相关问题。

英文摘要:

We study deterministic games of infinite duration played on graphs and focus on the strategy complexity of quantitative objectives. Such games are known to admit optimal memoryless strategies over finite graphs, but require infinite-memory strategies in general over infinite graphs. We provide new lower and upper bounds for the strategy complexity of mean-payoff and total-payoff objectives over infinite graphs, focusing on whether step-counter strategies (sometimes called Markov strategies) suffice to implement winning strategies. In particular, we show that over finitely branching arenas, three variants of limsup mean-payoff and total-payoff objectives admit winning strategies that are based either on a step counter or on a step counter and an additional bit of memory. Conversely, we show that for certain liminf total-payoff objectives, strategies resorting to a step counter and finite memory are not sufficient. For step-counter strategies, this settles the case of all classical quantitative objectives up to the second level of the Borel hierarchy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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