Abstract
In this paper, an oversampling collocation method based on shifted generalized Jacobi functions as a set of basis is proposed to find the numerical solutions of Volterra integral equations with contaminated data. We proved that the oversampling collocation method decreases the covariance matrix of the coefficients vector of the approximated solution in the sense of 2-norm, which indicates the oversampling collocation method is more robust(which means anti-jamming of white noise) than the standard collocation method when the right side of the Volterra equation has contaminated data. Numerical experiments demonstrate the effectiveness of this method and its consistency with the theoretical analysis.
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Acknowledgements
The authors are very grateful to the reviewers for their comments and suggestions which have improved the paper. This work was supported partially by the Open Fund for the Sichuan National Applied Mathematics Center (no. 2022-KFJJ-01-002).
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Zhao, D., Pu, L. & Yu, Y. Oversampling collocation method for the Volterra integral equation with contaminated data. Calcolo 59, 29 (2022). https://doi.org/10.1007/s10092-022-00473-6
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DOI: https://doi.org/10.1007/s10092-022-00473-6
Keywords
- Volterra integral equation
- Contaminated data
- Oversampling
- Collocation method
- Shifted generalized Jacobi function
- White noise