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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>Characteristic Cauchy Problem for a Loaded Wave Equation</article-title>
      </title-group>
      <trans-title-group xml:lang="ru">
        <trans-title>Характеристическая задача Коши для нагруженного волнового уравнения</trans-title>
      </trans-title-group>
      <article-id pub-id-type="doi">10.46698/p6864-6863-9599-h</article-id>
      <article-id pub-id-type="publisher-id">19852</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>17</fpage>
      <lpage>25</lpage>
      <self-uri xlink:href="https://vmj.ru/eng/archive/detail.php?ELEMENT_ID=19888&amp;SECTION_ID=673">https://vmj.ru/eng/archive/detail.php?ELEMENT_ID=19888&amp;SECTION_ID=673</self-uri>
      <contrib-group>
        <contrib contrib-type="author">
          <name-alternatives>
            <name xml:lang="ru">
              <surname>Аттаев</surname>
              <given-names>А. Х.</given-names>
            </name>
            <name xml:lang="en">
              <surname>Attaev</surname>
              <given-names>A. Kh.</given-names>
            </name>
          </name-alternatives>
          <email>attaev.anatoly@ya.ru</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
      </contrib-group>
      <aff-alternatives id="aff1">
        <aff xml:lang="ru">Институт прикладной математики и автоматизации КБНЦ РАН, Россия, 360000, Нальчик, ул. Шортанова 89А</aff>
        <aff xml:lang="en">Institute of Applied Mathematics and Automation KBSC RAS, 89A Shortanov St., Nalchik 360000, Russia</aff>
      </aff-alternatives>
      <abstract>The paper considers a loaded wave equation. Its peculiarity is that in characteristic variables \(\xi=x-y\), \(\eta=x+y\), the loaded components are a linear combination of unknown functions, which depend only on  \(\xi\) or \(\eta\). Moreover, the loaded part of this equation is a solution to the wave equation. For such an equation a representation of all its solutions is obtained. The problem is investigated in the case where the carrier is one of the characteristics of the wave equation, a setting known to be ill-posed for the usual string oscillation equation. For the Cauchy problem, the same characteristic carrier is considered. For a normal wave equation, such a formulation is known to be ill-posed. When some nonlocal conditions of a point nature are satisfied, the existence and uniqueness theorem for the given problem is proved, and the solution is written out explicitly. This shows the effect of the load as a regulator of the ill-posed problem.</abstract>
      <trans-abstract xml:lang="ru">В работе рассматривается одномерное нагруженное волновое уравнение. Особенностью такой нагрузки является то, что в характеристических переменных \(\xi=x-y\), \(\eta=x+y\) нагруженные компоненты представляют собой линейную комбинацию неизвестных функций, зависящих только от \(\xi\) или \(\eta\). Для исходного волнового уравнения получено представление всех его решений, являющееся аналогом представления общего решения обычного уравнения колебания струны. Для него исследована задача, в которой носителем данных Коши является одна из характеристик рассматриваемого нагруженного волнового   уравнения. Для обычного  уравнения колебания струны такая задача является некорректной. При выполнении некоторых нелокальных условий точечной природы доказана теорема существования и единственности решения, а само оно выписано в явном виде. Это показывает влияние нагрузки как регулятора для некорректной задачи. Регуляризация задачи Коши с данными на характеристиках происходит за счет наличия нагруженных слагаемых специального вида, каждое из которых отвечает за корректность на соответствующей характеристике.</trans-abstract>
      <kwd-group xml:lang="ru">
        <kwd>нагруженное уравнение</kwd>
        <kwd>волновое уравнение</kwd>
        <kwd>волновой оператор</kwd>
        <kwd>формула Даламбера</kwd>
        <kwd>характеристическая задача Коши</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <kwd>loaded equation</kwd>
        <kwd>wave equation</kwd>
        <kwd>wave operator</kwd>
        <kwd>d'Alembert formula</kwd>
        <kwd>characteristic Cauchy problem</kwd>
      </kwd-group>
    </article-meta>
  </front>
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</article>
