On the exponential integrability of the derivative of intersection and self-intersection local time for Brownian motion and related processes

Kaustav Das, Gregory Markowsky and Binghao Wu

Stochastic Processes and their Applications, 2025, vol. 183, issue C

Abstract: We show that the derivative of the intersection and self-intersection local times of alpha-stable processes are exponentially integrable for certain parameter values. This includes the Brownian motion case. We also discuss related results present in the literature for fractional Brownian motion, and in particular give a counter-example to a result in Guo et al. (2019) related to this question.

Keywords: Brownian motion; Local time; Self-intersection local time; Derivatives of self-intersection local time; Fractional Brownian motion; Exponential integrability (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1016/j.spa.2025.104592

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