Abstract
In this article, we consider to solve the inverse initial value problem for an inhomogeneous space-time fractional diffusion equation. This problem is ill-posed and the quasi-boundary value method is proposed to deal with this inverse problem and obtain the series expression of the regularized solution for the inverse initial value problem. We prove the error estimates between the regularization solution and the exact solution by using an a priori regularization parameter and an a posteriori regularization parameter choice rule. Some numerical results in one-dimensional case and two-dimensional case show that our method is efficient and stable.
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The project is supported by the National Natural Science Foundation of China (11561045, 11961044) and the Doctor Fund of Lan Zhou University of Technology.
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Yang, F., Zhang, Y., Liu, X. et al. The Quasi-Boundary Value Method for Identifying the Initial Value of the Space-Time Fractional Diffusion Equation. Acta Math Sci 40, 641–658 (2020). https://doi.org/10.1007/s10473-020-0304-5
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DOI: https://doi.org/10.1007/s10473-020-0304-5
Key words
- Space-time fractional diffusion equation
- Ill-posed problem
- quasi-boundary value method
- identifying the initial value