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arXiv · 2306.04273

About the regularity of degenerate non-local Kolmogorov operators under diffusive perturbations

Lorenzo Marino·Stéphane Menozzi·Enrico Priola
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Abstract

We study here the effects of a time-dependent second order perturbation to a degenerate Ornstein-Uhlenbeck type operator whose diffusive part can be either local or non-local. More precisely, we establish that some estimates, such as the Schauder and Sobolev ones, already known for the non-perturbed operator still hold, and with the same constants, when we perturb the Ornstein-Uhlenbeck operator with second order diffusions with coefficients only depending on time in a measurable way. The aim of the current work is twofold: we weaken the assumptions required on the perturbation in the local case which has been considered already in [KP17] and we extend the approach presented therein to a wider class of degenerate Kolmogorov operators with non-local diffusive part of symmetric stable type.

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Lorenzo Marino, Stéphane Menozzi, Enrico Priola. 2023-06-07. About the regularity of degenerate non-local Kolmogorov operators under diffusive perturbations. https://arxiv.org/abs/2306.04273

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