O. Davydov, J. Prasiswa and U. Reif, Two-stage approximation methods with extended B-splines, Math. Comp., 83 (2014), 809-833. doi:10.1090/S0025-5718-2013-02734-2

Abstract: We develop and analyze a framework for two-stage methods with EB-splines, applicable to continuous and discrete approximation problems. In particular, we propose a weighted discrete least squares fit that yields optimal convergence rates for sufficiently dense data on Lipschitz domains in R^d.

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