An efficient technique based on least-squares method for fractional integro-differential equations

In this paper, we investigate an efficient technique for solving fractional integro-differential equations (FIDEs) that have numerous applications in various fields of science. The proposed technique is based upon the Legendre orthonormal polynomial and least Csquares method (LSM). By dividing the d...

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Bibliographic Details
Published in:Alexandria engineering journal 2023-02, Vol.64, p.97-105
Main Authors: Jia, Yuntao, Xu, Minqiang, Lin, Yingzhen, Jiang, Danhua
Format: Article
Language:English
Subjects:
FIDEs
LSM
Optimal convergence order
Stability
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Summary:In this paper, we investigate an efficient technique for solving fractional integro-differential equations (FIDEs) that have numerous applications in various fields of science. The proposed technique is based upon the Legendre orthonormal polynomial and least Csquares method (LSM). By dividing the domain into n cells, a k-th order polynomial approximate solution in each cell can be obtained by LSM. The unique solvability and stability of the proposed numerical scheme are proven by analyzing the condition number of the matrix of the linear system. Moreover, the optimal convergence order under W22–norm is provided as well. Numerical examples are studied to verify our theoretical discovery. Comparison with the traditional reproducing kernel method and C3-spline method illustrates that our algorithm can obtain a more accurate approximating solution.
ISSN:1110-0168
DOI:10.1016/j.aej.2022.08.033