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arXiv math/0002220math.CO
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竞赛序列与Meeussen序列

Tournament Sequences and Meeussen Sequences

Matthew Cook, Michael Kleber

摘要:

“锦标赛序列”是正整数(t_1,t_2,.)使得t_1=1且t_{i+1} <= 2 t_i。Meeussen序列是由正整数(m_1,m_2,.)使得m_1=1,每个非负整数是{m_i}的子集的和,并且每个整数m_i-1是唯一的这样的子集的和。我们表明,这两个属性是同构的。也就是说,我们提出了一个双射比赛和Meeussen序列尊重自然树结构的每个集合。我们还提出了一个有效的技术来计算长度为n的竞赛序列的数量,并讨论了这个数字的渐近增长。我们介绍的计数技术适用于其他行为良好的同类计数问题,其中一个封闭的形式或生成函数无法找到。

英文摘要:

A "tournament sequence" is an increasing sequence of positive integers (t_1,t_2,...) such that t_1=1 and t_{i+1} <= 2 t_i. A "Meeussen sequence" is an increasing sequence of positive integers (m_1,m_2,...) such that m_1=1, every nonnegative integer is the sum of a subset of the {m_i}, and each integer m_i-1 is the sum of a unique such subset. We show that these two properties are isomorphic. That is, we present a bijection between tournament and Meeussen sequences which respects the natural tree structure on each set. We also present an efficient technique for counting the number of tournament sequences of length n, and discuss the asymptotic growth of this number. The counting technique we introduce is suitable for application to other well-behaved counting problems of the same sort where a closed form or generating function cannot be found.

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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