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arXiv 2407.04059math.PRmath-phmath.MP
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通过一致Tauber型定理的精确大偏差

Precise large deviations through a uniform Tauberian theorem

Università di Milano-Bicocca(米兰比可卡大学);CY Cergy Paris University(塞吉蓬图瓦兹CY巴黎大学)

Giampaolo Cristadoro, Gaia Pozzoli

AI总结:

通过证明Laplace-Stieltjes变换的一致Tauber型定理,为谱正稳定分布吸引域中的随机变量族推导大偏差原理,该方法可处理现有技术难以解决的随机游走长程记忆核和随机停时和等情形。

摘要:

我们通过证明Laplace-Stieltjes变换的一致版本Tauber型定理,为谱正稳定分布吸引域中的随机变量族推导了大偏差原理。该方法的主要优势在于,它可以轻松应用于当前文献中技术无法触及的情形。值得注意的例子包括具有长程记忆核的随机游走的大偏差,以及随机停时和的大偏差,其中随机时间$\mathrm N$要么不集中在期望附近,要么具有无限均值。该方法揭示了当Cramér条件被违反时特征函数的作用,并提供了正则变化框架内的统一方法。

英文摘要:

We derive a large deviation principle for families of random variables in the basin of attraction of spectrally positive stable distributions by proving a uniform version of the Tauberian theorem for Laplace-Stieltjes transforms. The main advantage of this method is that it can be easily applied to cases that are beyond the reach of the techniques currently used in the literature. Notable examples include large deviations for random walks with long-ranged memory kernels, as well as for randomly stopped sums where the random time $\mathrm N$ is either not concentrated around its expectation or has an infinite mean. The method reveals the role of the characteristic function when Cramér's condition is violated and provides a unified approach within regular variation.

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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