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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">matatecs</journal-id><journal-title-group><journal-title xml:lang="ru">Математика и теоретические компьютерные науки</journal-title><trans-title-group xml:lang="en"><trans-title>Mathematics and Theoretical Computer Science</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2949-3919</issn><publisher><publisher-name>Казанский (Приволжский) федеральный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26907/2949-3919.2024.2.4-29</article-id><article-id custom-type="elpub" pub-id-type="custom">matatecs-42</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>СТАТЬИ</subject></subj-group></article-categories><title-group><article-title>О функциональном пространстве со смешанной обобщенной логарифмической гладкостью</article-title><trans-title-group xml:lang="en"><trans-title>On a function space with mixed generalized logarithmic smoothness</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Акишев</surname><given-names>Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Akishev</surname><given-names>G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Габдолла  Акишев</p><p>ул. Кажымукана, д. 11, г. Астана, 100001; ул. Пушкина, д. 125, г. Алматы, 050010</p></bio><bio xml:lang="en"><p>Gabdolla  Akishev </p><p>11 Kazhymukan str., Astana 100001, Kazakhstan; 125 Pushkin str., Almaty 050010, Kazakhstan</p></bio><email xlink:type="simple">akishev_g@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московского государственного университета имени М.В. Ломоносова, Казахстанский филиал; &#13;
Институт математики и математического моделирования</institution><country>Казахстан</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow University, Kazakhstan Branch; &#13;
Institute of mathematics and mathematical modeling</institution><country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>28</day><month>07</month><year>2024</year></pub-date><volume>2</volume><issue>2</issue><elocation-id>4–29</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Акишев Г., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Акишев Г.</copyright-holder><copyright-holder xml:lang="en">Akishev G.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://matatecs.elpub.ru/jour/article/view/42">https://matatecs.elpub.ru/jour/article/view/42</self-uri><abstract><p>Рассматриваются анизотропное пространство Лоренца, 2π-периодических функций m переменных и пространство Никольского–Бесова – функций со смешанной обобщенной логарифмической гладкостью. Доказаны теоремы вложения для пространств функций со смешанной обобщенной логарифмической гладкостью.</p></abstract><trans-abstract xml:lang="en"><p>We consider the anisotropic Lorentz space of 2π-periodic functions of m variables and the Nikol’skii–Besov space of functions with mixed generalized logarithmic smoothness. Embedding theorems are proved for spaces of functions with mixed generalized logarithmic smoothness.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>пространство Лоренца</kwd><kwd>класс Никольского–Бесова</kwd><kwd>обобщенная гладкость</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Lorentz space</kwd><kwd>Nikol’ski–Besov class</kwd><kwd>generalized smoothness</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by a grant the Committee of Science of the Ministry of Science and Higher Education of the Republic of Kazakhstan (project AP19677486).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">С.Г. Крейн, Ю.И. Петунин, Е.М. Семенов, Интерполяция линейных операторов, Наука, М., 1978.</mixed-citation><mixed-citation xml:lang="en">S.G. Krein, Yu.I. Petunin, E.M. Semenov, Interpolation of linear operators, Ser. Translat. Math. Monographs 54, AMS, Providence, R.I., 1982.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">A.P. Blozinski, Multivariate rearrangements and Banach function spaces with mixed norms, Trans. Amer. Math. Soc. 263 (1), 149–167 (1981). DOI: https://doi.org/10.2307/1998649</mixed-citation><mixed-citation xml:lang="en">A.P. Blozinski, Multivariate rearrangements and Banach function spaces with mixed norms, Trans. Amer. Math. Soc. 263 (1), 149–167 (1981). DOI: https://doi.org/10.2307/1998649</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">V.I. Kolyada, On embedding theorems, In Nonlinear Analysis, Function Spaces and Applications, Proceedings of the Spring School held in Prague, Vol. 8, 35–94 (2007). URL: https://dml.cz/handle/10338.dmlcz/702492</mixed-citation><mixed-citation xml:lang="en">V.I. Kolyada, On embedding theorems, In Nonlinear Analysis, Function Spaces and Applications, Proceedings of the Spring School held in Prague, Vol. 8, 35–94 (2007). URL: https://dml.cz/handle/10338.dmlcz/702492</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Е.Д. Нурсултанов, О коэффициентах кратных рядов Фурье из Lp-пространств, Изв. РАН. Сер. матем. 64 (1), 95–122 (2000). DOI: https://doi.org/10.4213/im275</mixed-citation><mixed-citation xml:lang="en">E.D. Nursultanov, On the coefcients of multiple Fourier series in Lp-spaces, Izv. Math. 64 (1), 93–120 (2000). DOI: https://doi.org/10.1070/im2000v064n01ABEH000275</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">С.М. Никольский, Приближение функций многих переменных и теоремы вложения, Наука, М., 1977.</mixed-citation><mixed-citation xml:lang="en">S.M. Nikol’skii, Approximation of functions of several variables and embedding theorems, Nauka, Moscow, 1977 [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">П.И. Лизоркин, С.М. Никольский, Пространства функций смешанной гладкости с декомпозиционной точки зрения, Тр. МИАН СССР 187, 143–161 (1989). URL: https://www.mathnet.ru/rus/tm1807</mixed-citation><mixed-citation xml:lang="en">P.I. Lizorkin, S. M. Nikol’skii, Functional spaces of mixed smoothness from decompositional point of view, Proc. Steklov Inst. Math. 187, 163–184 (1990).</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">М.К. Потапов, Изучение некоторых классов функций при помощи приближения “углом”, Тр. МИАН СССР,117, 256–291 (1972). URL: https://www.mathnet.ru/rus/tm3100</mixed-citation><mixed-citation xml:lang="en">M.K. Potapov,  The study of certain classes of functions by means of “angular” approximation, Proc. Steklov Inst. Math. 117, 301–342 (1972).</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">М.К. Потапов, Теоремы вложения смешанной метрике, Тр. МИАН СССР 156, 143– 156 (1980). URL: https://www.mathnet.ru/rus/tm2415</mixed-citation><mixed-citation xml:lang="en">M.K. Potapov, Imbedding theorems in a mixed metric, Proc. Steklov Inst. Math. 156, 155– 171 (1983).</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">С.M. Никольский, Неравенства для целых функций конечной степени и их применение в теории дифференцируемых функций многих переменных, Тр. МИАН СССР 38, 244–278 (1951). URL: https://www.mathnet.ru/rus/tm1119</mixed-citation><mixed-citation xml:lang="en">S.M. Nikol’skii, Inequalities for entire functions of fi degree and their application in the theory of differentiable functions of several variables, Tr. Mat. Inst. Steklov 38, 244–278 (1951) [in Russian]. URL: https://www.mathnet.ru/rus/tm1119</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">О.В. Бесов, Исследование одного семейства функциональных пространств в связи с теоремами вложения и продолжения, Тр. МИАН СССР 60, 42–81 (1961). URL: https://www.mathnet.ru/rus/tm1480</mixed-citation><mixed-citation xml:lang="en">O.V. Besov, Investigation of a class of function spaces in connection with imbedding and extension theorems, Tr. Mat. Inst. Steklov 60, 42–81 (1961) [in Russian]. URL:  https://www.mathnet.ru/rus/tm1480</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">F. Cobos, O. Dominguez, On Besov spaces of logarithmic smoothness and Lipschitz spaces, J. Math. Anal. Appl. 425 (1), 71–84 (2015). DOI: https://doi.org/10.1016/j.jmaa.2014.12.034</mixed-citation><mixed-citation xml:lang="en">F. Cobos, O. Dominguez, On Besov spaces of logarithmic smoothness and Lipschitz spaces, J. Math. Anal. Appl. 425 (1), 71–84 (2015). DOI: https://doi.org/10.1016/j.jmaa.2014.12.034</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">F. Cobos, O. Dominguez, H. Triebel, Characterizations of logarithmic Besov spaces in terms of diff ences, Fourier-analytical decompositions, wavelets and semi-groups, J. Funct. Anal. 270 (12), 4386–4425 (2016). DOI: https://doi.org/10.1016/j.jfa.2016.03.007</mixed-citation><mixed-citation xml:lang="en">F. Cobos, O. Dominguez, H. Triebel, Characterizations of logarithmic Besov spaces in terms of diff ences, Fourier-analytical decompositions, wavelets and semi-groups, J. Funct. Anal. 270 (12), 4386–4425 (2016). DOI: https://doi.org/10.1016/j.jfa.2016.03.007</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">O. Dominguez, S. Tikhonov, Function spaces of logarithmic smoothness: embedding and characterizations, Preprint, arXiv:1811.06399 [math.FA], 2018. URL: https://arxiv.org/abs/1811.06399</mixed-citation><mixed-citation xml:lang="en">O. Dominguez, S. Tikhonov, Function spaces of logarithmic smoothness: embedding and characterizations, Preprint, arXiv:1811.06399 [math.FA], 2018. URL: https://arxiv.org/abs/1811.06399</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">S. Artamonov, K.V. Runovskii, H.-J. Schmeisser, Besov spaces with generalized smoothness and summability of multiple Fourier series, J. Approx. Theory 284, art. 105822 (2022). DOI: https://doi.org/10.1016/j.jat.2022.105822</mixed-citation><mixed-citation xml:lang="en">S. Artamonov, K.V. Runovskii, H.-J. Schmeisser, Besov spaces with generalized smoothness and summability of multiple Fourier series, J. Approx. Theory 284, art. 105822 (2022). DOI:  https://doi.org/10.1016/j.jat.2022.105822</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">С.М. Никольский, Функции с доминирующей смешанной производной, удовлетворяющей кратному условию Гёльдера, Сиб. матем. журн. 4 (6), 1342–1364 (1963). URL: https://www.mathnet.ru/rus/smj4971</mixed-citation><mixed-citation xml:lang="en">S. M. Nikol’skii, Functions with dominating mixed derivatives satisfying multiple H¨older conditions, Amer. Math. Soc. Transl. Ser. 2 102, 27–51 (1973).</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Т.И. Аманов, Пространства дифференцируемых функций с доминирующей смешанной производной, Наука, Алма-Ата, 1976.</mixed-citation><mixed-citation xml:lang="en">T.I. Amanov, Spaces of diferentiable functions with dominating mixed derivatives, AlmaAta, Nauka, 1976.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Н.К. Бари, С.Б. Стечкин, Наилучшие приближения и дифференциальные свойства двух сопряженных функций, Тр. ММО 5, 483–522 (1956). URL: https://www.mathnet.ru/rus/mmo56</mixed-citation><mixed-citation xml:lang="en">N.K. Bary, S.B. Stechkin, Best approximations and diff ential properties of two conjugate functions, Tr. Mosk. Mat. Obs. 5, 483–522 (1956) [in Russian]. URL: https://www.mathnet.ru/rus/mmo56</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">D.E. Edmunds, W.D. Evans, Hardy operators, function spaces and embedding, SpringerVerlag, Berlin, 2004. DOI: https://doi.org/10.1007/978-3-662-07731-3</mixed-citation><mixed-citation xml:lang="en">D.E. Edmunds, W.D. Evans, Hardy operators, function spaces and embedding, SpringerVerlag, Berlin, 2004. DOI: https://doi.org/10.1007/978-3-662-07731-3</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Н. Темиргалиев, О вложении классов Hω в пространства Лоренца, Сиб. матем. журн. 24 (2), 160–172 (1983). URL: https://www.mathnet.ru/rus/smj6703</mixed-citation><mixed-citation xml:lang="en">N. Temirgaliev, Embeddings of the classes Hω in Lorentz spaces, Sib. Math. J. 24 (2), 287–298 (1983). DOI: https://doi.org/10.1007/BF00968743</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Г. Акишев, Теоремы вложения пространств со смешанной логарифмической гладкостью, Традиционная международная апрельская математическая конференция в честь Дня науки Республики Казахстан: Тезисы докладов, 60–62 (2023).</mixed-citation><mixed-citation xml:lang="en">G. Akishev, Embedding theorems for spaces with mixed logarithmic smoothness, Traditional International April Mathematical Conference In Honor of the Kazakhstan Day of science workers, 60–62 (2023).</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Г. Акишев, О порядках приближения функций многих переменных в пространстве Лоренца, Тр. ИММ УрО РАН 22 (4), 13–28 (2016). DOI: https://doi.org/10.21538/0134-4889-2016-22-4-13-28</mixed-citation><mixed-citation xml:lang="en">G. Akishev, On approximation orders of functions of several variables in the Lorentz space, Proc. Steklov Inst. Math. 300 (Suppl 1), 9–24 (2018). DOI: https://doi.org/10.1134/S0081543818020037</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">H. Johansson, Embedding of Hω in some Lorentz spaces, Research Reports. Univ. Ume˚a, Report No. 6 (1975).</mixed-citation><mixed-citation xml:lang="en">H. Johansson, Embedding of Hωin some Lorentz spaces, Research Reports. Univ. Ume˚a, Report No. 6 (1975).</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">G. Akishev, Estimates of the order of approximation of functions of several variables in the generalized Lorentz space, Preprint: arXiv: 2105.14810v1 (2021). URL: https://arxiv.org/abs/2105.14810</mixed-citation><mixed-citation xml:lang="en">G. Akishev, Estimates of the order of approximation of functions of several variables in the generalized Lorentz space, Preprint: arXiv: 2105.14810v1 (2021). URL: https://arxiv.org/abs/2105.14810</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">M.K. Potapov, B.V. Simonov, S.Yu. Tikhonov, Mixed moduli of smoothness in Lp, 1 &lt; p &lt; ∞: a survey, Surveys in Approximation Theory 8, 1–57 (2013). URL: https://www.emis.de/journals/SAT/papers/18/index.html</mixed-citation><mixed-citation xml:lang="en">M.K. Potapov,  B.V. Simonov,  S.Yu. Tikhonov,  Mixed  moduli  of  smoothness  in  Lp, 1 &lt; p &lt; ∞: a survey, Surveys in Approximation Theory 8, 1–57 (2013). URL: https://www.emis.de/journals/SAT/papers/18/index.html</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">В.Н. Темляков, Приближение функций с ограниченной смешанной производной, Тр. МИАН СССР 178, 3–113 (1986). URL: https://www.mathnet.ru/rus/tm2107</mixed-citation><mixed-citation xml:lang="en">V.N. Temlyakov, Approximation of functions with bounded mixed derivative, Proc. Steklov Inst. Math. 178, 1–121 (1989).</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
