This paper is concerned with approximation methods for Neumanns integral equation on curves with corners. Necessary and sufficient conditions for the stability of the piecewise constant c-collocation and for the quadrature method, using the rectangular rule, are given.
Cite this article
Martin Costabel, V.J. Ervin, Ernst Peter Stephan, Quadrature and Collocation Methods for the Double Layer Potential on Polygons. Z. Anal. Anwend. 12 (1993), no. 4, pp. 699–707DOI 10.4171/ZAA/536