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arXiv math/0305031math.PRmath.CO
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随机组合结构:收敛情形

Random Combinatorial structures:the convergent case

A. D. Barbour, B. Granovsky

摘要:

本文研究了均匀随机森林这类组合结构的成分谱的分布,其中,不同大小的(不可约)元素在收敛半径收敛半径处收敛;在此,该性质用{ \it独立}随机变量$Z_j$,$j\ge1$的期望值表示,其联合分布,以$\sum_{j=1}^n jZ_j = n$为条件,给出尺寸为$n$的随机结构的组分谱分布。对于一个大类这样的结构,我们表明,组件谱是渐近组成的$Z_j$组件的大小$j$,$j\ge1$,与其余部分,大小$n-\sum_{j\ge1} Z_j$,由一个单一的,巨大的组件。

英文摘要:

This paper studies the distribution of the component spectrum of combinatorial structures such as uniform random forests, in which the classical generating function for the numbers of (irreducible) elements of the different sizes converges at the radius of convergence; here, this property is expressed in terms of the expectations of {\it independent} random variables $Z_j$, $j\ge1$, whose joint distribution, conditional on the event that $\sum_{j=1}^n jZ_j = n$, gives the distribution of the component spectrum for a random structure of size $n$. For a large class of such structures, we show that the component spectrum is asymptotically composed of $Z_j$ components of size $j$, $j\ge1$, with the remaining part, of size $n-\sum_{j\ge1} Z_j$, being made up of a single, giant component.

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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