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A spectral approach to non-linear weakly singular fractional integro-differential equations

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Abstract

In this work, a class of non-linear weakly singular fractional integro-differential equations is considered, and we first prove existence, uniqueness, and smoothness properties of the solution under certain assumptions on the given data. We propose a numerical method based on spectral Petrov-Galerkin method that handling to the non-smooth behavior of the solution. The most outstanding feature of our approach is to evaluate the approximate solution by means of recurrence relations despite solving complex non-linear algebraic system. Furthermore, the well-known exponential accuracy is established in \(L^{2}\)-norm, and we provide some examples to illustrate the theoretical results and the performance of the proposed method.

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Acknowledgements

This work is funded by national funds through the FCT - Fundação para a Ciência e a Tecnologia, I.P., under the scope of the projects UIDB/00297/2020 and UIDP/00297/2020 (Center for Mathematics and Applications).

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Correspondence to Magda Rebelo.

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Faghih, A., Rebelo, M. A spectral approach to non-linear weakly singular fractional integro-differential equations. Fract Calc Appl Anal 26, 370–398 (2023). https://doi.org/10.1007/s13540-022-00113-4

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  • DOI: https://doi.org/10.1007/s13540-022-00113-4

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