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arXiv 1901.07009math.NT
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整数的分块数的展开式

An expansion for the number of partitions of an integer

Stella Brassesco, Arnaud Meyroneinc

摘要:

我们得到了一个渐近展开$p(n)$,分区的自然数$n$的数量,从一个公式,它涉及到它的生成函数$f(t), t\in (0,1)$与一个家庭的特征函数的独立随机变量和索引为$t$。该展开式由一个因子(它是首项)乘以一个渐近级数展开式(以$\sqrt n$作为$n\to \infty$增长的量的逆幂表示)组成,其系数是简单的组合表达式。渐近级数是将特征函数按随机变量的累积量展开而得到的,并导出了简单而精确的逼近式和显式的精确公式。该计算也给出了因子的简明表达式。

英文摘要:

We obtain an asymptotic expansion for $p(n)$, the number of partitions of a natural number $n$, starting from a formula that relates its generating function $f(t), t\in (0,1)$ with the characteristic functions of a family of sums of independent random variables indexed by $t$. The expansion consists of a factor (which is the leading term) times an asymptotic series expansion in inverse powers of a quantity that grows as $\sqrt n$ as $n\to \infty$, and whose coefficients are simple combinatorial expressions. The asymptotic series is obtained by expanding the characteristic functions in terms of the cumulants of the random variables, for which simple and accurate approximations are derived, as well as explicit exact formulae. That computations also give a concise expression for the factor.

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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