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Found 13 Documents (Results 1–13)

Approximations by the de la Vallée-Poussin sums. (Приближения суммами Валле Пуссена.) (Russian) Zbl 1199.42001

Pratsi Instytutu Matematyky Natsional’noï Akademiï Nauk Ukraïny. Matematyka ta ïï Zastosuvannya 68. Kyïv: Instytut Matematyky NAN Ukraïny (ISBN 978-966-02-4593-8). 386 p. (2007).
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Approximation of continuous functions by de la Vallée Poussin operators. (Russian) Zbl 1129.42314

Stepanets’, O. I. (ed.), Ekstremal’ni zadachi teoriïfunktsij ta sumizhni pytannya. Kyïv: Instytut Matematyky NAN Ukraïny (ISBN 966-02-2940-2). Pratsi Instytutu Matematyky Natsional’noïAkademiïNauk Ukraïny. Matematyka ta ïïZastosuvannya 46, 192-208 (2003).
MSC:  42A10 42A32
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Approximation of \(\overline{\psi}\)-integrals of periodic functions in the uniform and integral metrics. (Russian) Zbl 1129.42311

Stepanets’, O. I. (ed.), Ekstremal’ni zadachi teoriïfunktsij ta sumizhni pytannya. Kyïv: Instytut Matematyky NAN Ukraïny (ISBN 966-02-2940-2). Pratsi Instytutu Matematyky Natsional’noïAkademiïNauk Ukraïny. Matematyka ta ïïZastosuvannya 46, 156-191 (2003).
MSC:  42A10 42A24 42A32
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Approximation of continuous periodic functions by de la Vallée Poussin sums (smoothness law). (Russian) Zbl 1129.42310

Stepanets’, O.I. (ed.), Teoriya nablyzhennya funktsij ta sumizhni pytannya. Kyïv: Instytut Matematyky NAN Ukraïny (ISBN 966-02-2617-9). Pratsi Instytutu Matematyky Natsional’noï Akademiï Nauk Ukraïny. Matematyka ta {ïï} Zastosuvannya 35, 134-150 (2002).
MSC:  42A10 41A17 42A32
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Approximation of classes of periodic functions with smoothness law by de la Vallée Poussin sums. (Russian) Zbl 1129.42313

Stepanets’, O.I. (ed.), Teoriya nablyzhennya funktsij ta sumizhni pytannya. Kyïv: Instytut Matematyky NAN Ukraïny (ISBN 966-02-2617-9). Pratsi Instytutu Matematyky Natsional’noï Akademiï Nauk Ukraïny. Matematyka ta {ïï} Zastosuvannya 35, 119-133 (2002).
MSC:  42A10 42A24 42A32
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Approximation of functions with low smoothness from classes \(C^{\overline \psi}_\omega\) by linear methods. (Russian) Zbl 1129.42312

Ukraïns’kyj matematychnyj kongres – 2001. Pratsi. Sektsiya 10. Teoriya nablyzhen’ ta garmonichnyj analiz. Kyïv: Instytut Matematyky NAN Ukraïny (ISBN 966-02-2649-7). 184-193 (2002).
MSC:  42A10 41A17 42A32
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Approximation of \(\overline{\psi}\)-integrals of periodic functions by de la Vallée Poussin sums (low smoothness). (English. Russian original) Zbl 1006.42002

Ukr. Math. J. 53, No. 12, 1998-2013 (2001); translation from Ukr. Mat. Zh. 53, No. 12, 1641-1653 (2001).
MSC:  42A10 41A17 42A32
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Full Text: DOI

Approximation of \(\overline{\psi}\)-integrals of \(2\pi\)-periodic functions by de la Vallée Poussin sums. (Russian) Zbl 1032.42007

Samoilenko, A. M. (ed.) et al., Fourier series: Theory and applications. Section: Function theory. Kyïv: Instytut Matematyky NAN Ukraïny. Pr. Inst. Mat. Nats. Akad. Nauk Ukr., Mat. Zastos. 20, 242-254 (1998).
MSC:  42A10 42A32 42A24
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