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Found 4 Documents (Results 1–4)

Approximation properties of repeated de la Vallée-Poussin means for piecewise smooth functions. (English. Russian original) Zbl 1426.42001

Sib. Math. J. 60, No. 3, 542-558 (2019); translation from Sib. Mat. Zh. 60, No. 3, 695-713 (2019).
MSC:  42A10 41A17
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Sobolev orthogonal polynomials generated by Jacobi and Legendre polynomials, and special series with the sticking property for their partial sums. (English. Russian original) Zbl 1416.33019

Sb. Math. 209, No. 9, 1390-1417 (2018); translation from Mat. Sb. 209, No. 9, 142-170 (2018).
MSC:  33C45 42C10
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Approximation properties of Fourier series of Sobolev orthogonal polynomials with Jacobi weight and discrete masses. (English. Russian original) Zbl 1372.42024

Math. Notes 101, No. 4, 718-734 (2017); translation from Mat. Zametki 101, No. 4, 611-629 (2017).
MSC:  42C10 33C45 41A10
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