Quadrature and Generalized Hermite Interpolation
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In  ENGELS has shown that WILF’s quadrature is an interpolatory quadrature, i.e. it may be constructed by integration of a generalized HERMITE interpolation operator which interpolates the integration and its derivative. The connection between this operator and polynomial HERMITE interpolation is shown. This leads to a simple expression for the error of WILF’s quadrature.
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