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arXiv 1409.2663math.PR
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迭代随机Lipschitz函数的平稳尾指标

On the stationary tail index of iterated random Lipschitz functions

Gerold Alsmeyer

摘要:

令$Ψ_1,Ψ_2,...$是i.i.d.随机Lipschitz函数在完备可分度量空间上具有无界度量$d$和前向迭代$X_n$ .假设$X_n$具有平稳分布。本文研究了泛函$D_n=d(x_0,X_n)$,$x_0$,任意参考点的平稳尾行为,给出了这些随机变量在非负半直线上的简单压缩迭代函数系的界.我们的结果提供了上下尾指数的$D_n$的界限,并将说明一些流行的例子,包括AR(1)模型的随机误差和随机逻辑变换。

英文摘要:

Let $Ψ_1,Ψ_2,...$ be a sequence of i.i.d. random Lipschitz functions on a complete separable metric space with unbounded metric $d$ and forward iterations $X_n$. Suppose that $X_n$ has a stationary distribution. We study the stationary tail behavior of the functional $D_n=d(x_0,X_n)$, $x_0$ an arbitrary reference point, by providing bounds for these random variables in terms of simple contractive iterated function systems on the nonnegative halfline. Our results provide bounds for the lower and upper tail index of $D_n$ and will be illustrated by a number of popular examples including the AR(1) model with ARCH errors and random logistic transforms.

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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