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A global approximation method for second-kind nonlinear integral equations

Author

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  • Fermo, Luisa
  • Laguardia, Anna Lucia
  • Laurita, Concetta
  • Russo, Maria Grazia

Abstract

A global approximation method of Nyström type is explored for the numerical solution of a class of nonlinear integral equations of the second kind. The cases of smooth and weakly singular kernels are both considered. In the first occurrence, the method uses a Gauss-Legendre rule whereas in the second one resorts to a product rule based on Legendre nodes. Stability and convergence are proved in functional spaces equipped with the uniform norm and several numerical tests are given to show the good performance of the proposed method. An application to the interior Neumann problem for the Laplace equation with nonlinear boundary conditions is also considered.

Suggested Citation

  • Fermo, Luisa & Laguardia, Anna Lucia & Laurita, Concetta & Russo, Maria Grazia, 2025. "A global approximation method for second-kind nonlinear integral equations," Applied Mathematics and Computation, Elsevier, vol. 487(C).
    • Handle: RePEc:eee:apmaco:v:487:y:2025:i:c:s0096300324005551
    DOI: 10.1016/j.amc.2024.129094
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