2019
DOI: 10.1007/978-3-030-12277-5_1
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On Some Properties of Moduli of Smoothness with Jacobi Weights

Abstract: We discuss some properties of the moduli of smoothness with Jacobi weights that we have recently introduced and that are defined asand α, β > −1/p if 0 < p < ∞, and α, β ≥ 0 if p = ∞. We show, among other things, that for all m, n ∈ N, 0 < p ≤ ∞, polynomials P n of degree < n and sufficiently small t, ω ϕ m,0 (P n , t) α,β,p ∼ tω ϕ m−1,1 (P ′ n , t) α,β,p ∼ · · · ∼ t m−1 ω ϕ 1,m−1 (P (m−1)where w α,β (x) = (1 − x) α (1 + x) β is the usual Jacobi weight.In the spirit of Yingkang Hu's work, we apply this to char… Show more

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“…). Throughout c denotes positive constants, whose value is independent of f and n. Instead of ω 2 ϕ (f, t) we can use the moduli defined and considered in [11,12], [10,15,16,17,18,19,22], or [9].…”
Section: Resultsmentioning
confidence: 99%
“…). Throughout c denotes positive constants, whose value is independent of f and n. Instead of ω 2 ϕ (f, t) we can use the moduli defined and considered in [11,12], [10,15,16,17,18,19,22], or [9].…”
Section: Resultsmentioning
confidence: 99%