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Full length article: Interpolation and approximation in Taylor spaces
Journal of Approximation Theory
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Suppose u is a function on a domain Ω in Rn all of whose mth order distributional derivatives are in Lp (Ω) and m is sufficiently large to imply that u is continuous. If the values of u on a sufficiently dense, but not necessarily regular, grid of points are in lp we obtain an estimate of the LP(Ω) norm of u in terms of the lp norm of these values and the Lp norms of its mth order derivatives. This result is useful in obtaining error estimates for certain interpolation schemes.