<article 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" article-type="research-article" dtd-version="1.2" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">Differential Equations</journal-id><journal-title-group><journal-title>Differential Equations</journal-title></journal-title-group><issn publication-format="print">0374-0641</issn><issn publication-format="electronic">3034-5030</issn><publisher><publisher-name>Russian Academy of Science</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.7868/S3034503025030069</article-id><title-group><article-title>CLASSIFICATION OF FIELD EQUATIONS FOR WEYL SPINORS AND ELKO SPINORS</article-title><trans-title-group xml:lang="ru"><trans-title>КЛАССИФИКАЦИЯ ПОЛЕВЫХ УРАВНЕНИЙ ДЛЯ СПИНОРОВ ВЕЙЛЯ И ELKO СПИНОРОВ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Marchuk</surname><given-names>N. G.</given-names></name><name xml:lang="ru"><surname>Марчук</surname><given-names>Н. Г. </given-names></name></name-alternatives><email>nmarchuk@mi-ras.ru</email><xref ref-type="aff" rid="aff-1"></xref><xref ref-type="aff" rid="aff-2"></xref></contrib></contrib-group><aff-alternatives id="aff-1"><aff><institution xml:lang="ru">Математический институт имени В.А. Стеклова РАН; Национальный исследовательский университет “Высшая школа экономики”</institution><institution xml:lang="en">Steklov Mathematical Institute of RAS; National Research University Higher School of Economics</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff><institution xml:lang="ru"></institution><institution xml:lang="en"></institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-03-17" publication-format="electronic"><day>17</day><month>03</month><year>2025</year></pub-date><volume>61</volume><issue>3</issue><fpage>366</fpage><lpage>373</lpage><abstract xml:lang="en"><p>A class of field (relativistically invariant) equations is introduced for a wave function consisting of several Weyl spinors. The equations are such that each of these Weyl spinors satisfies the Klein–Gordon equation with the same mass. Subclasses of equations of Majorana type and Dirac-type are introduced. It is shown that the known equations for Elko spinors belong to the subclass of Dirac-type equations.</p></abstract><trans-abstract xml:lang="ru"><p>Введены класс полевых (релятивистски инвариантных) уравнений для волновой функции, состоящей из нескольких спиноров Вейля, каждый из которых удовлетворяет уравнению Клейна–Гордона с одной и той же массой, и подклассы уравнений майорановского типа и дираковского типа. Показано, что известные уравнения для Elko спиноров входят в подкласс уравнений дираковского типа.</p></trans-abstract><kwd-group xml:lang="en"><kwd>уравнение Вейля уравнение Дирака уравнение Майораны спинор</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>уравнение Вейля уравнение Дирака уравнение Майораны спинор</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>B1</label><citation-alternatives><mixed-citation xml:lang="ru">. Марчук, Н.Г. Об одном классе релятивистски инвариантных уравнений первого порядка / Н.Г. 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