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On strongly elliptic singular integral operators with piecewise continuous coefficients

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Abstract

The concept of strongly elliptic operators is one of the main tools for approximating the solution of boundary integral equations by finite element methods (see [4-10]). In the present paper necessary and sufficient conditions for the strong ellipticity of singular integral operators with piecewise continuous matrix coefficients on a closed or open Ljapunov curve are obtained.

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Prößdorf, S., Rathsfeld, A. On strongly elliptic singular integral operators with piecewise continuous coefficients. Integr equ oper theory 8, 825–841 (1985). https://doi.org/10.1007/BF01213793

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