A Girsanov-type formula for a class of anticipative transforms of Brownian motion associated with exponential functionals
Abstract
In this paper, with the help of a result by Matsumoto--Yor (2000), we prove a Girsanov-type formula for a class of anticipative transforms of Brownian motion which possesses exponential functionals as anticipating factors. Our result unifies existing formulas in earlier works. As an application, we also consider the law of Brownian motion perturbed by a positive weight of a fairly wide class, and prove its invariance under an anticipative transformation associated with the perturbation. In the course of our exploration, a disintegration formula for the Wiener measure related to exponential functionals plays a key role.
Keywords
Cite
@article{arxiv.2211.12755,
title = {A Girsanov-type formula for a class of anticipative transforms of Brownian motion associated with exponential functionals},
author = {Yuu Hariya},
journal= {arXiv preprint arXiv:2211.12755},
year = {2024}
}
Comments
21 pages. A disintegration formula for the Wiener measure related to exponential functionals is added as Proposition 2.1, with which the results are fairly extended