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arXiv 1702.07068math.CO
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Nim和Silver Dollar博弈的近似析取和的Sprague-Grundy函数

The Sprague-Grundy function for some nearly disjunctive sums of Nim and Silver Dollar games

Graham Farr, Nhan Bao Ho

摘要:

我们引入并分析了经典的公平对策的析取和运算的一个推广。而析取和描述的位置形成的独立subpositions,我们的操作组合的位置是不完全独立的,但只在一个非常有限的方式相互作用。我们扩展了尼姆和银元的游戏,沿着一维的细胞条移动计数器,通过加入几个带在他们的初始细胞。我们证明,在某些情况下,计算的Sprague-Grundy函数可以简化为一个更简单的游戏,最多两个令牌在每个带。我们给出了一个算法,对于每个Sprague-Grundy值g,计算其Sprague-Grundy值为g的双令牌Star Nim的位置。我们建立了这些位置的条目的差异序列最终是加性周期的。

英文摘要:

We introduce and analyse an extension of the disjunctive sum operation on some classical impartial games. Whereas the disjunctive sum describes positions formed from independent subpositions, our operation combines positions that are not completely independent but interact only in a very restricted way. We extend the games Nim and Silver Dollar, played by moving counters along one-dimensional strips of cells, by joining several strips at their initial cell. We prove that, in certain cases, computing the Sprague-Grundy function can be simplified to that of a simpler game with at most two tokens in each strip. We give an algorithm that, for each Sprague-Grundy value g, computes the positions of two-token Star Nim whose Sprague-Grundy values are g. We establish that the sequence of differences of entries of these positions is ultimately additively periodic.

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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