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    On density of interpolation points, a Kadec-type theorem, and Saff's principle of contamination inL p-approximation

    Letf ∈L p (I) and denote byB n,p (f) the polynomial of bestL p-approximation tof of degreen (1<p<∞,I=[−1,1], the norm is weightedL p-norm with an arbitrary positive weight). Ex...

    A. Kroó, J. J. Swetits in Constructive Approximation (1992)