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A quadrature formula associated with a univariate quadratic spline quasi-interpolant

Paul Sablonniere

math.NAarXiv:math/0512439

Abstract

We study a new simple quadrature rule based on integrating a C1 quadratic spline quasi-interpolant on a bounded interval. We give nodes and weights for uniform and non-uniform partitions. We also give error estimates for smooth functions and we compare this formula with Simpson's rule.

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