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Space-time fractional stochastic partial differential equations with Lévy noise

  • Xiangqian Meng and Erkan Nane EMAIL logo
Published/Copyright: February 27, 2020

Abstract

We consider non-linear time-fractional stochastic heat type equation

βutβ+ν(Δ)α/2u=It1β[Rdσ(u(t,x),h)N~(t,x,h)]

and

βutβ+ν(Δ)α/2u=It1β[Rdσ(u(t,x),h)N(t,x,h)]

in (d + 1) dimensions, where α ∈ (0, 2] and d < min{2, β−1}α, ν > 0, tβ is the Caputo fractional derivative, −(−Δ)α/2 is the generator of an isotropic stable process, It1β is the fractional integral operator, N(t, x) are Poisson random measure with Ñ(t, x) being the compensated Poisson random measure. σ : ℝ → ℝ is a Lipschitz continuous function. We prove existence and uniqueness of mild solutions to this equation. Our results extend the results in the case of parabolic stochastic partial differential equations obtained in [16, 33]. Under the linear growth of σ, we show that the solution of the time fractional stochastic partial differential equation follows an exponential growth with respect to the time. We also show the nonexistence of the random field solution of both stochastic partial differential equations when σ grows faster than linear.

Acknowledgements

The authors thank the two anonymous referees for reading the paper carefully and for the many comments that improved the paper. The Authors also thank the editor for very useful comments that improved the paper immensely.

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Received: 2019-02-26
Revised: 2020-01-20
Published Online: 2020-02-27
Published in Print: 2020-02-25

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