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arXiv 0903.1871math.PR
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临界二元分枝系统占据时间的大数定律

Laws of Large Numbers for the Occupation Time of an Age-Dependent Critical Binary Branching System

José Alfredo López-Mimbela, Antonio Murillo Salas

摘要:

研究了$\Rd$中与年龄相关的分支粒子系统的占据时间,其中初始粒子数为Poisson随机场,粒子服从对称的$α$ -稳定迁移、临界二元分支和随机寿命.两个政权的寿命分布被认为是:寿命与有限的平均和寿命属于正常吸引区域力的$γ$稳定的法律,$γ\in(0,1)$。结果表明,在重尾寿命情形的$d>αγ$维数和有限平均寿命情形的$d>α$维数下,占据时间过程满足强大数律.

英文摘要:

The occupation time of an age-dependent branching particle system in $\Rd$ is considered, where the initial population is a Poisson random field and the particles are subject to symmetric $α$-stable migration, critical binary branching and random lifetimes. Two regimes of lifetime distributions are considered: lifetimes with finite mean and lifetimes belonging to the normal domain of attraction of a $γ$-stable law, $γ\in(0,1)$. It is shown that in dimensions $d>αγ$ for the heavy-tailed lifetimes case, and $d>α$ for finite mean lifetimes, the occupation time proccess satisfies a strong law of large numbers.

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