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A class of fractional Ornstein-Uhlenbeck processes mixed with a Gamma distribution

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FD2W01 - Deterministic and stochastic fractional differential equations and jump processes

We consider a sequence of fractional Ornstein-Uhlenbeck processes, that are defined as solutions of a family of stochastic Volterra equations with 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. Based on a joint work with Luigi Amedeo Bianchi and Luciano Tubaro.

This talk is part of the Isaac Newton Institute Seminar Series series.

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