Abstract
In this paper, we estimate the error of best approximation of Lψ ,p (I) –approximation 0 < p < 1,ψ(x) > 0, to the function f ∈ Lψ ,p (I) ∩ Δ0 (JN ) by spline in terms of usual modulus of smoothness for quasi-normed space and Ditzian-Totik modulus for Chebyshev knots.
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