A corner-graded change of variables plus a change of unknown that absorbs the vanishing line element yields 8th-10th order convergence for 2D scattering integral equations with unbounded densities at corners.
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High order-accurate solution of scattering integral equations with unbounded solutions at corners
A corner-graded change of variables plus a change of unknown that absorbs the vanishing line element yields 8th-10th order convergence for 2D scattering integral equations with unbounded densities at corners.