Abstract
Error bounds are derived for the Lagrange interpolation formula and for the k-th derivative of the residual term of this formula in terms of the Lipschitz constant of the n-th derivative for the case with (n+1) nodes and also for the case when the functions satisfy a special condition: ∃G ∃ℝ ∀x, y, z ∃ [a, b]: ¦ ϕ(x)(z−y) +Φ(y)(x−z)+Φ(z)(y−x)¦≤G¦(x−y)(y−z)(z−x)¦.
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Translated from Vychislitel'naya i Prikladnaya Matematika, No. 73, pp. 27–32, 1992.
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Golovach, G.P. Some more general bounds on the residual term of the Lagrange interpolation formula. J Math Sci 71, 2645–2649 (1994). https://doi.org/10.1007/BF02114038
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DOI: https://doi.org/10.1007/BF02114038