Abstract
Let H be a Hilbert space and E a Banach space. We set up a theory of stochastic integration of ℒ(H,E)-valued functions with respect to H-cylindrical Liouville fractional Brownian motion with arbitrary Hurst parameter 0 < β < 1. For 0 < β < ½ we show that a function Φ: (0, T) → ℒ(H,E) is stochastically integrable with respect to an H-cylindrical Liouville fractional Brownian motion if and only if it is stochastically integrable with respect to an H-cylindrical fractional Brownian motion.
We apply our results to stochastic evolution equations
driven by an H-cylindrical Liouville fractional Brownian motion, and prove existence, uniqueness and space-time regularity of mild solutions under various assumptions on the Banach space E, the operators A: D(A) → E and B: H → E, and the Hurst parameter.
As an application it is shown that second-order parabolic SPDEs on bounded domains in ℝd, driven by space-time noise which is white in space and Liouville fractional in time, admit a mild solution if ¼d < β < 1.
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The first named author thanks Eurandom for kind hospitality. The second named author gratefully acknowledges financial support by VICI subsidy 639.033.604 of the Netherlands Organization for Scientific Research (NWO).
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Brzeźniak, Z., van Neerven, J. & Salopek, D. Stochastic evolution equations driven by Liouville fractional Brownian motion. Czech Math J 62, 1–27 (2012). https://doi.org/10.1007/s10587-012-0011-z
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DOI: https://doi.org/10.1007/s10587-012-0011-z