Abstract
In this paper, we develop a collocation method for solving third-kind Volterra integral equations. In order to achieve high order convergence for problems with nonsmooth solutions, we construct a collocation scheme on a modified graded mesh using a basis of fractional polynomials, depending on a certain parameter \(\lambda \). For the proposed method, we derive an error estimate in the \(L^\infty \)-norm, which shows that the optimal order of global convergence can be obtained by choosing the appropriate parameter \(\lambda \) and modified mesh, even when the exact solution has low regularity. Numerical experiments confirm the theoretical results and illustrate the performance of the method.
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The authors would like to thank the editor and the anonymous referees for their valuable suggestions and comments.
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This work was supported by National Natural Science Foundation of China (Nos. 12171177 and 12011530058).
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Ma, Z., Huang, C. Fractional Collocation Method for Third-Kind Volterra Integral Equations with Nonsmooth Solutions. J Sci Comput 95, 26 (2023). https://doi.org/10.1007/s10915-023-02155-z
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DOI: https://doi.org/10.1007/s10915-023-02155-z
Keywords
- Third-kind Volterra integral equation
- Nonsmooth solution
- Fractional polynomial
- Collocation method
- Error estimate