Asymptotic preserving schemes for SDEs driven by fractional Brownian motion in the averaging regime
Résumé
We design numerical schemes for a class of slow-fast systems of stochastic differential equations, where the fast component is an Ornstein-Uhlenbeck process and the slow component is driven by a fractional Brownian motion with Hurst index H ą 1{2. We establish the asymptotic preserving property of the proposed scheme: when the timescale parameter goes to 0, a limiting scheme which is consistent with the averaged equation is obtained. With this numerical analysis point of view, we thus illustrate the recently proved averaging result for the considered SDE systems and the main differences with the standard Wiener case.
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Commentaire : Ce pdf est la version preprint de l'article (version soumise à l'éditeur, avant peer-reviewing)