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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">cheb</journal-id><journal-title-group><journal-title xml:lang="ru">Чебышевский сборник</journal-title><trans-title-group xml:lang="en"><trans-title>Chebyshevskii Sbornik</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-8383</issn><publisher><publisher-name>Tula State Lev Tolstoy  Pedagogical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22405/2226-8383-2024-25-5-57-73</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1870</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><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Article</subject></subj-group></article-categories><title-group><article-title>О нулях периодических в среднем функций относительно свёртки Бесселя</article-title><trans-title-group xml:lang="en"><trans-title>On the zeros of mean-periodic functions with respect to the Bessel convolution</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>Волчков</surname><given-names>Виталий Владимирович</given-names></name><name name-style="western" xml:lang="en"><surname>Volchkov</surname><given-names>Vitaly Vladimirovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук</p></bio><bio xml:lang="en"><p>doctor of physical and mathematical sciences</p></bio><email xlink:type="simple">volna936@gmail.com</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>Краснощёких</surname><given-names>Глеб Витальевич</given-names></name><name name-style="western" xml:lang="en"><surname>Krasnoschekikh</surname><given-names>Gleb Vitalyevich</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант</p></bio><bio xml:lang="en"><p>postgraduate student</p></bio><email xlink:type="simple">wolverimred@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Донецкий государственный университет»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Donetsk National University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>20</day><month>01</month><year>2025</year></pub-date><volume>25</volume><issue>5</issue><fpage>57</fpage><lpage>73</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Волчков В.В., Краснощёких Г.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Волчков В.В., Краснощёких Г.В.</copyright-holder><copyright-holder xml:lang="en">Volchkov V.V., Krasnoschekikh G.V.</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://www.chebsbornik.ru/jour/article/view/1870">https://www.chebsbornik.ru/jour/article/view/1870</self-uri><abstract><p>В статье изучаются множества единственности для решений уравнения свертки Бесселя 𝑓𝛼 ⋆𝑔 = 0, 𝛼 ∈ (−1/2,+∞). Показано, в частности, что если 𝑔 = 𝜒𝑟 – индикатор отрезка [−𝑟, 𝑟], а чётная функция 𝑓 ∈ 𝐶(R) удовлетворяет уравнению 𝑓𝛼 ⋆ 𝜒𝑟 = 0 и равна нулю на (𝑟 − 𝜀, 𝑟) или (𝑟, 𝑟 + 𝜀) при некотором 𝜀 &gt; 0, то 𝑓 = 0 на (𝑟 − 𝜀, 𝑟 + 𝜀). При этом интервал нулей (𝑟 − 𝜀, 𝑟 + 𝜀), вообще говоря, расширить нельзя. Установлено, что подобное явление имеет место и для решений уравнения 𝑓 𝛼 ⋆ 𝛿𝑟 = 0, где 𝛿𝑟 – чётная мера, сопоставляющая чётной непрерывной функции 𝜙 на R число 𝜙(𝑟). Найдены приложения этих результатов к теоремам единственности для сходящихся последовательностей линейных комбинацийфункций Бесселя, теоремам о нулевых множествах для решений задачи Коши обобщенного уравнения Эйлера-Пуассона-Дарбу и теоремам о замыкании обобщенных сдвигов.</p></abstract><trans-abstract xml:lang="en"><p>In paper, we study uniqueness sets for solutions to the Bessel convolution equation 𝑓𝛼 ⋆𝑔 = 0, 𝛼 ∈ (−1/2,+∞). It is shown, in particular, that if 𝑔 = 𝜒𝑟 is an indicator function of the segment [−𝑟, 𝑟], and an even function 𝑓 ∈ 𝐶(R) satisfies the equation 𝑓𝛼 ⋆𝜒𝑟 = 0and is zero on (𝑟 − 𝜀, 𝑟) or (𝑟, 𝑟 + 𝜀) for some 𝜀 &gt; 0, then 𝑓 = 0 on (𝑟 − 𝜀, 𝑟 + 𝜀). In this case, the intervalof zeros (𝑟 − 𝜀, 𝑟 + 𝜀), cannot generally be extended. It has been established that a similar phenomenon occurs for solutions of the equation 𝑓𝛼 ⋆𝛿𝑟 = 0, where 𝛿𝑟 is an even measure that maps an even continuous function 𝜙 on R to a number 𝜙(𝑟). Applications of these results to uniqueness theorems for convergent sequences of linear combinations of Bessel functions, the zero set theorem for solutions of the Cauchy problem of the generalized Euler-Poisson-Darbouxequation and the closure theorem of generalized shifts are found.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>обобщенная свертка</kwd><kwd>сферическое преобразование</kwd><kwd>множества единственности</kwd><kwd>теоремы о замыкании сдвигов</kwd><kwd>лакунарные ряды.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>generalized convolution</kwd><kwd>spherical transformation</kwd><kwd>uniqueness sets</kwd><kwd>shift closure theorems</kwd><kwd>lacunar series.</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование проводилось в рамках государственного задания Министерства науки и высшего образования Российской Федерации (тема № 124012400352-6).</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">Delsarte, J. 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