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Optimal approximation and error bounds in spaces of bivariate functions. (English) Zbl 0247.41012


MSC:

41A30 Approximation by other special function classes
41A50 Best approximation, Chebyshev systems
41A65 Abstract approximation theory (approximation in normed linear spaces and other abstract spaces)
41A55 Approximate quadratures
Full Text: DOI

References:

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