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总览 评价 何辉 ( **北京师范大学**数学科学学院,北京 100875; ) 摘要: 通过研究Li(2014)所引入的一族容许的分枝机制,从而得到一个关于 Levy 树的剪切手法。然后通过剪切Levy树和条件无穷大的临界Levy树得到一个递减的Levy连续型随机树值过程${T_t}$和
何辉
(
**北京师范大学**数学科学学院,北京 100875; )
摘要:
通过研究Li(2014)所引入的一族容许的分枝机制,从而得到一个关于 Levy 树的剪切手法。然后通过剪切Levy树和条件无穷大的临界Levy树得到一个递减的Levy连续型随机树值过程${T_t}$和一个与之对应的过程${T^*_t}$。在一定的正则条件下,证明了${T_t}$在飞跃时刻的分布可以用${T^*_t}$表示出来。这些结果推广了 Abraham and Delmas (2012)中相应的结果。
关键词:
概率论与数理统计;一族容许分枝机制;分枝过程;L'evy 树;剪切
HE Hui
(
School of Mathematical Sciences, Beijing Normal University, Beijing 100875; )
Abstract:
By studying an admissible family of branching mechanisms introduced in Li (2014), a pruning procedure on L'evy trees is obtained. Then a decreasing L'evy-CRT-valued process ${T_t}$ by pruning L'evy trees and an analogous process ${T^*_t}$ are constructed by pruning a critical L'evy tree conditioned to be infinite. Under a regular condition on the admissible family of branching mechanisms, it is shown that the law of ${T_t}$ at the ascension time can be represented by ${T^*_t}$. The results generalize those studied in Abraham and Delmas (2012).
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