Summary
Introduction of the projection operatorP leads to a modification of the Peano representation of remainders for quadrature rules. Combining the different versions of the remainders yields additional estimates.
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Literatur
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Potempa, H. Modifizierte Restgliedabschätzungen für Quadraturformeln. Numer. Math. 30, 39–50 (1978). https://doi.org/10.1007/BF01403905
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DOI: https://doi.org/10.1007/BF01403905