Summary
Piecewise polynomial Galerkin approximations for Fredholm integral equations of the second kind are shown to posses superconvergence properties in some circumstances.
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Richter, G.R. Superconvergence of piecewise polynomial Galerkin approximations, for Fredholm integral equations of the second kind. Numer. Math. 31, 63–70 (1978). https://doi.org/10.1007/BF01396014
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DOI: https://doi.org/10.1007/BF01396014