Abstract
For stochastic evolution equations with fractional derivatives, classical solutions exist when the order of the time derivative of the unknown function is not too small compared to the order of the time derivative of the noise; otherwise, there can be a generalized solution in suitable weighted chaos spaces. Presence of fractional derivatives in both time and space leads to various modifications of the stochastic parabolicity condition. Interesting new effects appear when the order of the time derivative in the noise term is less than or equal to one-half.
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Lototsky, S.V., Rozovsky, B.L. Classical and generalized solutions of fractional stochastic differential equations. Stoch PDE: Anal Comp 8, 761–786 (2020). https://doi.org/10.1007/s40072-019-00158-2
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DOI: https://doi.org/10.1007/s40072-019-00158-2
Keywords
- Anomalous diffusion
- Caputo derivative
- Chaos expansion
- Gaussian Volterra process
- Stochastic parabolicity condition