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Problemy Fiziki, Matematiki i Tekhniki (Problems of Physics, Mathematics and Technics), 2021, Issue 2(47), Pages 81–83
(Mi pfmt784)
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MATHEMATICS
Trigonometric Padé approximants of special functions
N. V. Ryabchenko Francisk Skorina Gomel State University
Abstract:
For the functions Hγ=∑∞k=1sinkx/(γ)k, where (γ)k=γ(γ+1)⋯(γ+k−1) and their trigonometric Padé approximations πtn,m(x;Hγ) the asymptotics of decreasing difference Hγ(x)−πtn,m(x;Hγ) in the case is found, where 0⩽m⩽m(n), m(n)=o(n), as n→∞. Particulary, we determine that, under the same assumption, the trigonometric Padé approximations πtn,m(x;Hγ) converge to Hγ uniformly on the R with the asymptotically best rate.
Keywords:
Padé approximations, asymptotic equality, best uniform approximation, trigonometric Padé approximations, rational approximations.
Received: 05.03.2021
Citation:
N. V. Ryabchenko, “Trigonometric Padé approximants of special functions”, PFMT, 2021, no. 2(47), 81–83
Linking options:
https://www.mathnet.ru/eng/pfmt784 https://www.mathnet.ru/eng/pfmt/y2021/i2/p81
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Abstract page: | 108 | Full-text PDF : | 41 | References: | 28 |
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