THE REGULARIZED SOLUTION APPROXIMATION OF FORWARD/BACKWARD PROBLEMS FOR A FRACTIONAL PSEUDO-PARABOLIC EQUATION WITH RANDOM NOISE*

  • Huafei DI ,
  • Weijie Rong
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  • 1. School of Mathematics and Information Science, Guangzhou University, Guangzhou 510006, China;
    2. Key Laboratory of Mathematics and Interdisciplinary Sciences of Guangdong Higher Education Institutes, Guangzhou University, Guangzhou 510006, China
Weijie Rong,E-mail: rongweijie1995@163.com

Received date: 2021-05-12

  Revised date: 2022-06-26

  Online published: 2023-03-01

Supported by

*Natural Science Foun-dation of China (11801108), the Natural Science Foundation of Guangdong Province (2021A1515010314), and the Science and Technology Planning Project of Guangzhou City (202201010111).

Abstract

This paper deals with the forward and backward problems for the nonlinear fractional pseudo-parabolic equation $u_{t}+(-\Delta)^{s_{1}} u_{t}+\beta(-\Delta)^{s_{2}}u=F(u,x,t)$ subject to random Gaussian white noise for initial and final data. Under the suitable assumptions $s_{1}$, $s_{2}$ and $\beta$, we first show the ill-posedness of mild solutions for forward and backward problems in the sense of Hadamard, which are mainly driven by random noise. Moreover, we propose the Fourier truncation method for stabilizing the above ill-posed problems. We derive an error estimate between the exact solution and its regularized solution in an $\mathbb{E}\parallel\cdot\parallel^{2}_{H^{s_{2}}}$ norm, and give some numerical examples illustrating the effect of above method.

Cite this article

Huafei DI , Weijie Rong . THE REGULARIZED SOLUTION APPROXIMATION OF FORWARD/BACKWARD PROBLEMS FOR A FRACTIONAL PSEUDO-PARABOLIC EQUATION WITH RANDOM NOISE*[J]. Acta mathematica scientia, Series B, 2023 , 43(1) : 324 -348 . DOI: 10.1007/s10473-023-0118-3

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