Abstract
In this note we study the local behaviour of the multi-variate Bernstein polynomials B, on the d-dimensional simplex S⊂R d. For function f admitting derivatives of sufficient high order in x∈S we derive the complete asymptotic expansion of Bnf as n tends to infinity. All the coefficients of n−1 that only depend on f and x are calculated explicitly. It turns out that combinatorial numbers play an important role. Par result generalize recent formulae due to R. Zhang in a way.
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Ulrich, A., Mircea, I. Asymptotic expansion of the multivariate Bernstein polynomials on a simplex. Approx. Theory & its Appl. 16, 85–93 (2000). https://doi.org/10.1007/BF02837059
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DOI: https://doi.org/10.1007/BF02837059