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Differentiability of spectral functions for nearly stable processes and large deviations

机译:光谱函数的可微性,用于接近稳定的过程和较大的偏差

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摘要

We consider the differentiability of a spectral function generated by a Lévy process M with characteristic exponent |ξ|~αl(|ξ|~2), where l(x) is a slowly varying function at ∞. As an application, we obtain the large deviation principle for positive continuous additive functionals of M. Finally, we show that the exponent l(x) = (log(1 + x))~(β/2) (0< β< 2 - α) is an example for which our theorem is applicable.
机译:我们考虑由Lévy过程M生成的具有特征指数|ξ|〜αl(|ξ|〜2)的谱函数的可微性,其中l(x)是在∞处的缓慢变化的函数。作为应用,我们获得了M的正连续加性泛函的大偏差原理。最后,我们证明了指数l(x)=(log(1 + x))〜(β/ 2)(0 <β<2 -α)是适用我们定理的一个例子。

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