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arXiv 2107.08428math.CO
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局部有限对策的扩展Sprague-Grundy理论及其在随机对策树中的应用

Extended Sprague-Grundy theory for locally finite games, and applications to random game-trees

James B. Martin

摘要:

为纪念埃尔文·伯利坎普(1940-2019),约翰·康威(1937-2020)和理查德·盖伊(1916-2020)而收集的论文。斯普拉格-格伦迪无圈有限对策理论由塞德里克·史密斯和阿维耶兹里·弗伦克尔及其合著者推广到一般的有限对策。我们观察到,用于对有限对策进行分类的同一框架也涵盖了局部有限对策的情况(即,任何位置都只有100个选项的对策)。特别地,任何局部有限对策都等价于某个有限对策。然后,我们研究的情况下,一个游戏的有向图是随机选择的,并给出了一个高尔顿-沃森分支过程的树。后代分布的自然家庭显示出令人惊讶的广泛行为。这种设置显示了组合对策论和概率论思想之间的良好相互作用。

英文摘要:

For a collection of papers in memory of Elwyn Berlekamp (1940-2019), John Conway (1937-2020), and Richard Guy (1916-2020). The Sprague-Grundy theory for finite games without cycles was extended to general finite games by Cedric Smith and by Aviezri Fraenkel and coauthors. We observe that the same framework used to classify finite games also covers the case of locally finite games (that is, games where any position has only finitely many options). In particular, any locally finite game is equivalent to some finite game. We then study cases where the directed graph of a game is chosen randomly, and is given by the tree of a Galton-Watson branching process. Natural families of offspring distributions display a surprisingly wide range of behaviour. The setting shows a nice interplay between ideas from combinatorial game theory and ideas from probability.

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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