arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1502.02849cs.GTmath.PR
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额头上的数字游戏

A numbers-on-foreheads game

Sune K. Jakobsen

摘要:

是否存在自然数上的$n$随机变量的联合分布,使得它们总是形成一个递增序列,并且无论何时,当你取相同基数的随机变量集合的两个子集时,它们的分布几乎相同?我们证明了答案是肯定的,但是随机变量必须取$2^{2^{\dots ^{2^{Θ\left(\frac{1}ε\right)}}}}$那么大的值,其中$ε\leq ε_n$测量两个分布的差异,塔包含$n-2$ $2$,并且允许$Θ$符号中的常数依赖于$n$。这个结果在博弈论中有一个重要的结果:它表明,即使你可以定义广泛的形式的游戏,但不能在能告诉时间的玩家身上实现,你也可以有任意近似游戏的实现。

英文摘要:

Is there a joint distribution of $n$ random variables over the natural numbers, such that they always form an increasing sequence and whenever you take two subsets of the set of random variables of the same cardinality, their distribution is almost the same? We show that the answer is yes, but that the random variables will have to take values as large as $2^{2^{\dots ^{2^{Θ\left(\frac{1}ε\right)}}}}$, where $ε\leq ε_n$ measures how different the two distributions can be, the tower contains $n-2$ $2$'s and the constants in the $Θ$ notation are allowed to depend on $n$. This result has an important consequence in game theory: It shows that even though you can define extensive form games that cannot be implemented on players who can tell the time, you can have implementations that approximate the game arbitrarily well.

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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