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Regularity of Local Times Associated with Volterra–Lévy Processes and Path-Wise Regularization of Stochastic Differential Equations

Harang, Fabian Andsem; Ling, Chengcheng
Journal article, Peer reviewed
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Harang-Ling2021_Article_RegularityOfLocalTimesAssociat.pdf (485.7Kb)
URI
https://hdl.handle.net/11250/2786053
Date
2021
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  • Scientific articles [1667]
Original version
Journal of Theoretical Probability (2021)   10.1007/s10959-021-01114-4
Abstract
We investigate the space-time regularity of the local time associated with Volterra–Lévy processes, including Volterra processes driven by α-stable processes for α∈(0,2]. We show that the spatial regularity of the local time for Volterra–Lévy process is P-a.s. inverse proportional to the singularity of the associated Volterra kernel. We apply our results to the investigation of path-wise regularizing effects obtained by perturbation of ordinary differential equations by a Volterra–Lévy process which has sufficiently regular local time. Following along the lines of Harang and Perkowski (2020), we show existence, uniqueness and differentiability of the flow associated with such equations.
Publisher
Springer
Journal
Journal of theoretical probability

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