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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">kaz29</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Казахстанско-Британского технического университета</journal-title><trans-title-group xml:lang="en"><trans-title>Herald of the Kazakh-British Technical University</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1998-6688</issn><issn pub-type="epub">2959-8109</issn><publisher><publisher-name>Казахстанско-Британский Технический Университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.55452/1998-6688-2025-22-4-266-278</article-id><article-id custom-type="elpub" pub-id-type="custom">kaz29-2299</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>МАТЕМАТИЧЕСКИЕ НАУКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICAL SCIENCES</subject></subj-group></article-categories><title-group><article-title>ЧИСЛЕННОЕ РЕШЕНИЕ ИНТЕГРАЛЬНОГО УРАВНЕНИЯ ФРЕДГОЛЬМА ПЕРВОГО РОДА МЕТОДОМ БУБНОВА–ГАЛЁРКИНА С ИСПОЛЬЗОВАНИЕМ БАЗИСОВ ВЕЙВЛЕТОВ АЛЬПЕРТА</article-title><trans-title-group xml:lang="en"><trans-title>ALPERT WAVELET-BASED GALERKIN METHOD  FOR FIRST-KIND FREDHOLM INTEGRAL EQUATIONS</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8315-5849</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тамабай</surname><given-names>Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Tamabay</surname><given-names>D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>докторант</p><p>г. Алматы</p></bio><bio xml:lang="en"><p>PhD student</p><p>Almaty</p></bio><email xlink:type="simple">dtamabay@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4157-2799</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Темирбеков</surname><given-names>А.</given-names></name><name name-style="western" xml:lang="en"><surname>Temirbekov</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>PhD, ассоциированный профессор</p><p>г. Алматы</p></bio><bio xml:lang="en"><p>PhD, Associate Professor</p><p>Almaty</p></bio><email xlink:type="simple">almas_tem@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9280-1048</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тлеулесова</surname><given-names>А.</given-names></name><name name-style="western" xml:lang="en"><surname>Tleulesova</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>PhD</p><p>г. Алматы</p></bio><bio xml:lang="en"><p>PhD</p><p>Almaty</p></bio><email xlink:type="simple">aigerim1985_06@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0000-8522-3390</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Муханова</surname><given-names>Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Mukhanova</surname><given-names>T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>студент</p><p>г. Алматы</p></bio><bio xml:lang="en"><p>Bachelor’s student</p><p>Almaty</p></bio><email xlink:type="simple">tomirismukhanova04@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Казахский национальный университет им. аль-Фараби; Национальная инженерная академия РК<country>Казахстан</country></aff><aff xml:lang="en">Al-Farabi Kazakh National University; National Engineering Academy of the Republic of Kazakhstan<country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>23</day><month>12</month><year>2025</year></pub-date><volume>22</volume><issue>4</issue><fpage>266</fpage><lpage>278</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Тамабай Д., Темирбеков А., Тлеулесова А., Муханова Т., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Тамабай Д., Темирбеков А., Тлеулесова А., Муханова Т.</copyright-holder><copyright-holder xml:lang="en">Tamabay D., Temirbekov A., Tleulesova A., Mukhanova T.</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://vestnik.kbtu.edu.kz/jour/article/view/2299">https://vestnik.kbtu.edu.kz/jour/article/view/2299</self-uri><abstract><p>В данной статье представлен численный подход к решению интегральных уравнений Фредгольма первого рода с применением метода Бубнова–Галёркина и базисных функций в виде вейвлетов Альперта. Эти уравнения известны своей некорректностью: малейшие изменения во входных данных могут вызывать существенные отклонения в решении. В связи с этим необходимы устойчивые и точные численные методы. Предлагаемый метод использует ортонормированные и компактно поддержанные вейвлеты Альперта, обладающие отличными локализационными свойствами. Они обеспечивают хорошо обусловленные и разреженные матрицы системы при проецировании интегрального оператора, что повышает численную устойчивость и снижает вычислительную сложность. Серия численных экспериментов была проведена с различными уровнями уточнения и степенями полиномов. Точность метода оценивалась путем сравнения приближенных решений с точным аналитическим решением. Результаты показали исключительно малые абсолютные ошибки, зачастую близкие к машинной точности. Кроме того, сравнительный анализ с базисами из степенных полиномов подтвердил превосходство подхода, основанного на вейвлетах Альперта, как по скорости сходимости, так и по качеству аппроксимации. В целом метод продемонстрировал эффективность, устойчивость и пригодность к дальнейшему расширению на более сложные классы интегральных уравнений, включая многомерные задачи и задачи с зашумленными данными. Это подтверждает потенциал вейвлетных схем Галёркина с базисами Альперта как надежного инструмента для численного решения некорректных и обратных задач в прикладных науках.</p></abstract><trans-abstract xml:lang="en"><p>This paper presents a numerical approach for solving Fredholm integral equations of the first kind using the Bubnov–Galerkin method with Alpert wavelet bases. These equations are well-known for being ill-posed, meaning that small changes in input data can lead to large deviations in the solution. Therefore, robust and accurate numerical methods are essential. The proposed method utilizes orthonormal and compactly supported Alpert wavelets, which offer excellent localization properties and yield well-conditioned, sparse system matrices when projecting the integral operator. This enhances numerical stability and reduces computational complexity. A series of computational experiments was carried out using various refinement levels and polynomial degrees.</p><p>The accuracy of the method was evaluated by comparing approximate solutions to the exact analytical solution. The results demonstrate exceptionally small absolute errors, often approaching machine precision. Additionally, a comparative analysis with power polynomial bases confirms the superiority of the Alpert wavelet approach in terms of convergence and approximation quality. Overall, the method proves to be efficient, stable, and suitable for further extension to more complex integral equations, including multidimensional and noisy-data problems. This confirms the potential of Alpert wavelet-based Galerkin schemes as a reliable tool for the numerical treatment of inverse and ill-posed problems in applied sciences.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>интегральное уравнение Фредгольма первого рода</kwd><kwd>метод Бубнова–Галёркина</kwd><kwd>вейвлет Альперта</kwd><kwd>некорректность задачи</kwd><kwd>ортонормированный базис</kwd></kwd-group><kwd-group xml:lang="en"><kwd>first kind Fredholm Integral equation</kwd><kwd>Bubnov–Galerkin method</kwd><kwd>Alpert wavelet</kwd><kwd>ill-posedness</kwd><kwd>orthonormal basis</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>The research is funded by Science Committee of the Ministry of Science and Higher Education of the Republic of Kazakhstan (Grant No. BR27100483 "Development of predictive exploration technologies for identifying ore-prospective areas based on data analysis from the unified subsurface user platform "Minerals.gov.kz" using artificial intelligence and remote sensing methods").</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">Bakushinskii, A.B. 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