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Approximate solutions of nonlinear functional Volterra integral equations using ramp basis functions

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  • Qarehbolagh, Peyman Abolghasemi
  • Bazm, Sohrab

Abstract

A collocation method based on ramp basis functions is proposed for the numerical solution of nonlinear functional Volterra integral equations of Urysohn type. Exploiting the local support of the ramp functions, the resulting collocation system has a lower-triangular structure, which allows the approximate solution to be computed sequentially and avoids the solution of large nonlinear algebraic systems. A convergence analysis is presented, and error estimates are derived under mild regularity assumptions using a nonlinear Gronwall inequality, which guarantee first-order convergence of the method.

Suggested Citation

  • Qarehbolagh, Peyman Abolghasemi & Bazm, Sohrab, 2026. "Approximate solutions of nonlinear functional Volterra integral equations using ramp basis functions," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 248(C), pages 727-745.
  • Handle: RePEc:eee:matcom:v:248:y:2026:i:c:p:727-745
    DOI: 10.1016/j.matcom.2026.05.002
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