A class of fractional Ornstein–Uhlenbeck processes mixed with a Gamma distribution
Volume 10, Issue 1 (2023), pp. 37–57
Pub. online: 21 November 2022
Type: Research Article
Open Access
Open Access
Received
14 October 2021
14 October 2021
Revised
7 November 2022
7 November 2022
Accepted
7 November 2022
7 November 2022
Published
21 November 2022
21 November 2022
Abstract
We consider a sequence of fractional Ornstein–Uhlenbeck processes, that are defined as solutions of a family of stochastic Volterra equations with a kernel given by the Riesz derivative kernel, and leading coefficients given by a sequence of independent Gamma random variables. We construct a new process by taking the empirical mean of this sequence. In our framework, the processes involved are not Markovian, hence the analysis of their asymptotic behaviour requires some ad hoc construction. In our main result, we prove the almost sure convergence in the space of trajectories of the empirical means to a given Gaussian process, which we characterize completely.
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