Výsledky vyhledávání - "I. V. Sokolenko"

Наближення сумами Фур’є на класах диференційовних у сенсі Вейля – Надя функцій із високим показником гладкості

Publikováno v: Ukrains’kyi Matematychnyi Zhurnal. 74:685-700

УДК 517.5 Встановлено асимптотичні оцінки точних верхніх меж відхилень у рівномірній метриці частинних сум Фур'є порядку n - 1 на класах 2 π -

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6e2e9865bdf7f21fe28fecc2dc2b5996
https://doi.org/10.37863/umzh.v74i5.7136

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Asymptotic estimates for the best uniform approximations of classes of convolution of periodic functions of high smoothness

Autor: A. S. Serdyuk, I. V. Sokolenko

We find two-sides estimates for the best uniform approximations of classes of convolutions of $2\pi$-periodic functions from unit ball of the space $L_p, 1 \le p
Comment: 19 pages

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a52c16eeccb30625bbc0b47b82bf7276
http://arxiv.org/abs/2008.01450

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The energy spectra of the graphene-based quasi-periodic superlattice

Autor: I. V. Sokolenko, A. I. Sokolenko, A. M. Korol

Publikováno v: Low Temperature Physics. 44:803-809

The spectra of the Dirac quasi-electrons transmission through the Fibonacci quasi-periodical superlattice (SL) are calculated and analyzed in the continuum model with the help of the transfer matrix method. The one-dimensional SL based on a monolayer

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ed85130e5d2df55a9cb996058acf428
https://doi.org/10.1063/1.5049162

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Ballistic Transmission of the Dirac Quasielectrons Through the Barrier in the 3D Tоpological Insulators

Autor: A. I. Sokolenko, N. V. Medvid, A. M. Korol, I. V. Sokolenko

Publikováno v: Springer Proceedings in Physics ISBN: 9783030177584

Topological insulators belong to the new class of substances that have recently been called Dirac materials ([1] and references therein). These include very different objects in their structure, in particular the low- and high-temperature d-wave supe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c30c33ef45cb4dcf8307edeeec41a8ce
https://doi.org/10.1007/978-3-030-17759-1_35

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Calculation of Gamma Photon Propagation Processes in a Composite Material

Autor: N.I. Cherkashina, A.V. Noskov, I. V. Sokolenko, V. I. Pavlenko, R. N. Yastrebinskii

Publikováno v: Russian Physics Journal. 59:1192-1197

The paper presents the data on radiation protection properties of a composite material consisting of the glass-crystalline matrix and nanotubular chrysotile modified by inserting PbWO4 into its structure, as well as the data on key physico-mechanical

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f850f7a32e5f3c29576b548549671d63
https://doi.org/10.1007/s11182-016-0890-9

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Asymptotic equalities for best approximations for classes of infinitely differentiable functions defined by the modulus of continuity

Autor: I. V. Sokolenko, A. S. Serdyuk

Publikováno v: Mathematical Notes. 99:901-915

We obtain asymptotic estimates for best approximations by trigonometric polynomials in the metric of the space C(Lp) for classes of periodic functions expressible as convolutions of kernels Ψβ with Fourier coefficients decreasing to zero faster tha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9b82dec5f3602e88765156a0f0c322ed
https://doi.org/10.1134/s0001434616050291

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Correction to: Approximation by Interpolation Trigonometric Polynomials in Metrics of the Space Lp on the Classes of Periodic Entire Functions

Autor: A. S. Serdyuk, I. V. Sokolenko

Publikováno v: Ukrainian Mathematical Journal. 71:984-984

The title of the article should read: Approximation by Interpolation Trigonometric Polynomials in Metrics of the Space Lp on the Classes of Periodic Entire Functions The original article has been corrected.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cf1fd96cb657b4ebd0f4da9d0d084997
https://doi.org/10.1007/s11253-019-01681-0

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Linear approximation methods and the best approximations of the Poisson integrals of functions from the classes $ {H_{{\omega_p}}} $ in the metrics of the spaces L p

Autor: I. V. Sokolenko, A. S. Serdyuk

Publikováno v: Ukrainian Mathematical Journal. 62:1139-1157

We obtain upper estimates for the least upper bounds of approximations of the classes of Poisson integrals of functions from $ {H_{{\omega_p}}} $ for 1 ≤ p < ∞ by a certain linear method U n * in the metric of the space L p . It is shown that the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1f27532978d9caf8d34b701950666bec
https://doi.org/10.1007/s11253-010-0419-2

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