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<article article-type="research-article" dtd-version="1.1" 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">
  <front>
    <journal-meta>
      <issn publication-format="print">1683-3414</issn>
      <issn publication-format="electronic">1814-0807</issn>
      <journal-title-group>
        <journal-title>Владикавказский математический журнал</journal-title>
        <trans-title-group xml:lang="en">
          <trans-title>Vladikavkaz Mathematical Journal</trans-title>
        </trans-title-group>
      </journal-title-group>
      <publisher>
        <publisher-name>Южный математический институт - филиал Федерального государственного бюджетного учреждения науки Федерального научного центра «Владикавказский научный центр Российской академии наук» (ЮМИ ВНЦ РАН)</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <title-group>
        <article-title>The Turing-Hopf Bifurcation Problem in Three-Dimensional Reaction-Diffusion Systems</article-title>
      </title-group>
      <trans-title-group xml:lang="ru">
        <trans-title>Задача о бифуркации Тьюринга - Хопфа в трехмерных системах "реакция-диффузия"</trans-title>
      </trans-title-group>
      <article-id pub-id-type="doi">10.46698/f6031-1077-3134-o</article-id>
      <article-id pub-id-type="publisher-id">19863</article-id>
      <pub-date publication-format="electronic" date-type="pub">
        <month>09</month>
        <year>2026</year>
      </pub-date>
      <volume>28</volume>
      <issue>3</issue>
      <fpage>60</fpage>
      <lpage>73</lpage>
      <self-uri xlink:href="https://vmj.ru/eng/archive/detail.php?ELEMENT_ID=19899&amp;SECTION_ID=673">https://vmj.ru/eng/archive/detail.php?ELEMENT_ID=19899&amp;SECTION_ID=673</self-uri>
      <contrib-group>
        <contrib contrib-type="author">
          <name-alternatives>
            <name xml:lang="ru">
              <surname>Васенина</surname>
              <given-names>Н. А.</given-names>
            </name>
            <name xml:lang="en">
              <surname>Vasenina</surname>
              <given-names>N. A.</given-names>
            </name>
          </name-alternatives>
          <email>zhiber.na@gmail.com</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <contrib contrib-type="author">
          <name-alternatives>
            <name xml:lang="ru">
              <surname>Юмагулов</surname>
              <given-names>М. Г.</given-names>
            </name>
            <name xml:lang="en">
              <surname>Yumagulov</surname>
              <given-names>M. G.</given-names>
            </name>
          </name-alternatives>
          <email>yum_mg@mail.ru</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
      </contrib-group>
      <aff-alternatives id="aff1">
        <aff xml:lang="ru">Уфимский университет науки и технологий, Россия, 450076, Уфа, ул. Заки Валиди, 32</aff>
        <aff xml:lang="en">Ufa University of Science and Technology, 32 Zaki Validi St., Ufa 450076, Russia</aff>
      </aff-alternatives>
      <abstract>The article discusses the issues of studying local bifurcations in the vicinity of spatially homogeneous equilibrium positions of the reaction-diffusion system in a limited area with homogeneous Neumann boundary conditions.	The main results concern the interaction	between the Turing bifurcation and the Andronov-Hopf bifurcation, which leads to the Turing-Hopf bifurcation. In such a situation, there are two types of diffusive instabilities, which can lead to a variety of effects, accompanied by the emergence of complex space-time regimes. The article discusses in detail the conditions for Turing-Hopf bifurcations and offers new necessary and sufficient criteria bifurcations, leading to effective formulas for studying them. When solving the main problem of the signs of the Turing--Hopf bifurcation, we obtain calculation formulas for studying Turing and Andronov-Hopf bifurcations in two-dimensional and three-dimensional systems; these formulas are of independent theoretical and practical interest.</abstract>
      <trans-abstract xml:lang="ru">В статье обсуждаются вопросы исследования локальных бифуркаций в окрестностях пространственно однородных	положений равновесия системы "реакция-диффузия" в ограниченной области с однородными краевыми условиями Неймана. Основные результаты касаются изучения задачи о взаимодействии  бифуркаций Тьюринга и Андронова - Хопфа, приводящего к бифуркации Тьюринга - Хопфа. В такой бифуркации проявляются два типа  диффузионных неустойчивостей, что может приводить к разнообразным  эффектам, сопровождающимся  возникновением сложных пространственно-временных режимов.	С целью изучения  основной задачи предлагаются новые расчетные формулы для исследования задач о бифуркациях Тьюринга и  Андронова - Хопфа в одномерных, двумерных и трехмерных системах  "реакция-диффузия". Полученные формулы представляют самостоятельный интерес. Проведено исследование условий, приводящих к бифуркации Тьюринга - Хопфа. Основным результатом является установление ее реализуемости   в трехмерных системах "реакция-диффузия".  Приводится соответствующий пример. Обсуждаются также возможные направления развития предложенных результатов в задачах исследования  диффузионной неустойчивости и соответствующих  бифуркаций.</trans-abstract>
      <kwd-group xml:lang="ru">
        <kwd>реакция-диффузия</kwd>
        <kwd>положение равновесия</kwd>
        <kwd>устойчивость</kwd>
        <kwd>бифуркация</kwd>
        <kwd>Тьюринг</kwd>
        <kwd>Андронов - Хопф</kwd>
        <kwd>Тьюринг - Хопф</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <kwd>reaction-diffusion</kwd>
        <kwd>equilibrium position</kwd>
        <kwd>stability</kwd>
        <kwd>bifurcation</kwd>
        <kwd>Turing</kwd>
        <kwd>Andronov-Hopf</kwd>
        <kwd>Turing-Hopf</kwd>
      </kwd-group>
    </article-meta>
  </front>
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          <mixed-citation xml:lang="en">Vyshinsky, A. A., Ibragimova, L. S., Murtazina, S. A. and Yumagulov, M. G. An Operator Method for Approximate Investigation of a Regular Bifurcation in Multiparameter Dynamical Systems, Ufa Mathematical Journal, 2010, vol. 2, no. 4, pp. 3–26 (in Russian).</mixed-citation>
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  </back>
</article>
