English

High order corrected trapezoidal rules for a class of singular integrals

Numerical Analysis 2023-07-27 v4 Numerical Analysis

Abstract

We present a family of high order trapezoidal rule-based quadratures for a class of singular integrals, where the integrand has a point singularity. The singular part of the integrand is expanded in a Taylor series involving terms of increasing smoothness. The quadratures are based on the trapezoidal rule, with the quadrature weights for Cartesian nodes close to the singularity judiciously corrected based on the expansion. High order accuracy can be achieved by utilizing a sufficient number of correction nodes around the singularity to approximate the terms in the series expansion. The derived quadratures are applied to the Implicit Boundary Integral formulation of surface integrals involving the Laplace layer kernels.

Keywords

Cite

@article{arxiv.2203.04854,
  title  = {High order corrected trapezoidal rules for a class of singular integrals},
  author = {Federico Izzo and Olof Runborg and Richard Tsai},
  journal= {arXiv preprint arXiv:2203.04854},
  year   = {2023}
}

Comments

41 pages, 9 figures, 2 tables, 2 appendices

R2 v1 2026-06-24T10:07:35.309Z