Abstract
Let C(Q) denote the space of continuous functions f(x, y) in the square Q = [−1, 1] × [−1, 1] with the norm
On a Chebyshev grid, a cubature formula of the form
is considered in some class H(r 1, r 2) of functions f ∈ C(Q) defined by a generalized shift operator. The remainder R m, n (f) is proved to satisfy the estimate
where r 1, r 2 > 1; λ−1 ≤ n/m ≤ λ with λ > 0; and the constant in O(1) depends on λ.
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References
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V. A. Abilov and M. K. Kerimov, “Estimates for Remainder Terms of Multiple Fourier-Chebyshev Series and Chebyshev Cubature Formulas,” Comput. Math. Math. Phys. 43, 613–632 (2003).
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Original Russian Text © V.A. Abilov, M.K. Kerimov, 2012, published in Zhurnal Vychislitel’noi Matematiki i Matematicheskoi Fiziki, 2012, Vol. 52, No. 8, pp. 1373–1377.
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Abilov, V.A., Kerimov, M.K. Estimation of the remainder of a cubature formula on a Chebyshev grid. Comput. Math. and Math. Phys. 52, 1089–1093 (2012). https://doi.org/10.1134/S0965542512080027
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DOI: https://doi.org/10.1134/S0965542512080027