<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">dan-197</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>МАТЕМАТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICS</subject></subj-group></article-categories><title-group><article-title>АППРОКСИМАЦИЯ ЛУЗИНА ФУНКЦИЙ ИЗ КЛАССОВ СОБОЛЕВА НА УЛЬТРАМЕТРИЧЕСКИХ ПРОСТРАНСТВАХ С УСЛОВИЕМ УДВОЕНИЯ</article-title><trans-title-group xml:lang="en"><trans-title>LUZIN-TYPE APPROXIMATION OF THE FUNCTIONS IN THE SOBOLEV CLASSES ON ULTRAMETRIC SPACES WITH THE DOUBLING CONDITION</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>ГУБКИНА</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>GUBKINA</surname><given-names>E. V.</given-names></name></name-alternatives><email xlink:type="simple">helenvl@bk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>ЗАБЕЛЛО</surname><given-names>К. В.</given-names></name><name name-style="western" xml:lang="en"><surname>ZABELA</surname><given-names>K. V.</given-names></name></name-alternatives><email xlink:type="simple">k.v.zabello@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>ПРОХОРОВИЧ</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>PROKHOROVICH</surname><given-names>M. A.</given-names></name></name-alternatives><email xlink:type="simple">prohorovich@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>РАДЫНО</surname><given-names>Е. М.</given-names></name><name name-style="western" xml:lang="en"><surname>RADYNA</surname><given-names>Ya. M.</given-names></name></name-alternatives><email xlink:type="simple">yauhen.radyna@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Белорусский национальный технический университет, Минск</institution><country>Belarus</country></aff><aff xml:lang="ru" id="aff-2"><institution>Белорусский государственный университет, Минск</institution><country>Belarus</country></aff><pub-date pub-type="collection"><year>2014</year></pub-date><pub-date pub-type="epub"><day>08</day><month>06</month><year>2016</year></pub-date><volume>58</volume><issue>2</issue><fpage>22</fpage><lpage>25</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ГУБКИНА Е.В., ЗАБЕЛЛО К.В., ПРОХОРОВИЧ М.А., РАДЫНО Е.М., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">ГУБКИНА Е.В., ЗАБЕЛЛО К.В., ПРОХОРОВИЧ М.А., РАДЫНО Е.М.</copyright-holder><copyright-holder xml:lang="en">GUBKINA E.V., ZABELA K.V., PROKHOROVICH M.A., RADYNA Y.M.</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://doklady.belnauka.by/jour/article/view/197">https://doklady.belnauka.by/jour/article/view/197</self-uri><abstract><p>В работе рассматривается аналог теоремы Лузина об исправлении для пространств соболевского типа на ультраметрических пространствах с условием удвоения. Исправляющая функция принадлежит классу Гельдера и приближает заданную функцию в метрике исходного пространства. Размеры исключительных множеств оцениваются в терминах емкостей и вместимостей Хаусдорфа. Этот результат был ранее получен для частного случая пространства p-адических векторов.</p></abstract><trans-abstract xml:lang="en"><p>In this article, we consider an analog of the Luzin theorem on the correction for Sobolev-type spaces on ultrametric spaces with a doubling condition. The correcting function belongs to the Hölder class and approximates a given function in the metrics of the initial space. Dimensions of exceptional sets are evaluated in terms of capacities and Hausdorff volumes. This result was previously obtained for the special case of the p-adic vector space.</p></trans-abstract></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Кротов В. Г., Прохорович М. А. // Изв. вузов. Математика. 2008. № 5. С. 55-66.</mixed-citation><mixed-citation xml:lang="en">Кротов В. Г., Прохорович М. А. // Изв. вузов. Математика. 2008. № 5. С. 55-66.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Губкина Е. В., Олешкевич Д. Н., Прохорович М. А., Радыно Е. М. // Докл. НАН Беларуси. 2012. Т. 56, № 3. С. 16-18.</mixed-citation><mixed-citation xml:lang="en">Губкина Е. В., Олешкевич Д. Н., Прохорович М. А., Радыно Е. М. // Докл. НАН Беларуси. 2012. Т. 56, № 3. С. 16-18.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Губкина Е. В., Забелло К. В., Прохорович М. А., Радыно Е. М. // Проблемы физики, математики и техники. 2013. № 2 (15). С. 58–65.</mixed-citation><mixed-citation xml:lang="en">Губкина Е. В., Забелло К. В., Прохорович М. А., Радыно Е. М. // Проблемы физики, математики и техники. 2013. № 2 (15). С. 58–65.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Hajlasz P. // Potential Analysis. 1996. Vol. 5, N 4. P. P. 403-415.</mixed-citation><mixed-citation xml:lang="en">Hajlasz P. // Potential Analysis. 1996. Vol. 5, N 4. P. P. 403-415.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Yang D. // Science in China (series A). 2003. Vol. 46, N 5. P. P. 675-689.</mixed-citation><mixed-citation xml:lang="en">Yang D. // Science in China (series A). 2003. Vol. 46, N 5. P. P. 675-689.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Иванишко И. А. // Математ. заметки. 2005. Т. 77, № 6. С. 937-940.</mixed-citation><mixed-citation xml:lang="en">Иванишко И. А. // Математ. заметки. 2005. Т. 77, № 6. С. 937-940.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Calderon A. P. // Studia Mathematica. 1972. Vol. 44. P. P. 561-582.</mixed-citation><mixed-citation xml:lang="en">Calderon A. P. // Studia Mathematica. 1972. Vol. 44. P. P. 561-582.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Kinnunen J., Martio O. // Annales Academiae Scientiarum Fennicae Mathematica. 1996. Vol. 21. P. 367-382.</mixed-citation><mixed-citation xml:lang="en">Kinnunen J., Martio O. // Annales Academiae Scientiarum Fennicae Mathematica. 1996. Vol. 21. P. 367-382.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Прохорович М. А. // Весці НАН Беларусі. Сер. фіз.-мат. навук. 2006. № 1. С. 19-23.</mixed-citation><mixed-citation xml:lang="en">Прохорович М. А. // Весці НАН Беларусі. Сер. фіз.-мат. навук. 2006. № 1. С. 19-23.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Hajlasz P., Kinnunen J. // Revista Matemática Iberoamericana. 1998. Vol. 14, N 3. P. P. 601-622.</mixed-citation><mixed-citation xml:lang="en">Hajlasz P., Kinnunen J. // Revista Matemática Iberoamericana. 1998. Vol. 14, N 3. P. P. 601-622.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Jonsson A. // J. of mathematical analysis and applications. 2004. Vol. 290, N 1. P. P. 86–104.</mixed-citation><mixed-citation xml:lang="en">Jonsson A. // J. of mathematical analysis and applications. 2004. Vol. 290, N 1. P. P. 86–104.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Hewitt E., Ross K. A. Abstract harmonic analysis. Vol 1. Springer, 1979. – 269 p.</mixed-citation><mixed-citation xml:lang="en">Hewitt E., Ross K. A. Abstract harmonic analysis. Vol 1. Springer, 1979. – 269 p.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Прохорович М. А. // Математ. заметки. 2009. Т. 85, № 4. С. 616–621.</mixed-citation><mixed-citation xml:lang="en">Прохорович М. А. // Математ. заметки. 2009. Т. 85, № 4. С. 616–621.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Губкина Е. В., Прохорович М. А., Радыно Е. М. // Докл. НАН Беларуси. 2013. Т. 57, № 2. С. 17–19.</mixed-citation><mixed-citation xml:lang="en">Губкина Е. В., Прохорович М. А., Радыно Е. М. // Докл. НАН Беларуси. 2013. Т. 57, № 2. С. 17–19.</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>
