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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">izvuzmath</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Математика</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-3446</issn><issn pub-type="epub">2076-4626</issn><publisher><publisher-name>Казанский (Приволжский) федеральный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26907/0021-3446-2026-1-72-84</article-id><article-id custom-type="elpub" pub-id-type="custom">izvuzmath-251</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></article-categories><title-group><article-title>Коммутативные локальные кольца, верхнетреугольные матрицы над которыми представимы в виде суммы коммутирующих идемпотента и q-потента</article-title><trans-title-group xml:lang="en"><trans-title>Commutative local rings over which every upper-triangular matrix is the sum of an idempotent and a q-potent that commute</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>Тапкин</surname><given-names>Д. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Tapkin</surname><given-names>D. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тапкин Даниль Тагирзянович.</p><p>ул. Кремлевская, д. 18, Казань, 420008</p></bio><bio xml:lang="en"><p>Danil T. Tapkin.</p><p>18 Kremlyovskaya str., Kazan, 420008</p></bio><email xlink:type="simple">danil.tapkin@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанский федеральный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan Federal University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>12</day><month>02</month><year>2026</year></pub-date><volume>0</volume><issue>1</issue><fpage>72</fpage><lpage>84</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Тапкин Д.Т., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Тапкин Д.Т.</copyright-holder><copyright-holder xml:lang="en">Tapkin D.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://izvuzmath.elpub.ru/jour/article/view/251">https://izvuzmath.elpub.ru/jour/article/view/251</self-uri><abstract><p>Исследована задача представимости вехнетреугольных матриц над коммутативными локальными кольцами в виде суммы коммутирующих идемпотента и $q$-потента. Для колец Галуа и колец вида $\mathbb{F}_{p^{k}}[x]/\langle x^{r} \rangle$ получены необходимые и достаточные условия представимости.</p></abstract><trans-abstract xml:lang="en"><p>We study commutative local rings over which every upper-triangular matrix is the sum of an idempotent and a $q$-potent that commute. For Galois rings and rings of the form $\mathbb{F}_{p^{k}}[x]/\langle x^{r} \rangle$, necessary and sufficient criterion are provided.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>матричное кольцо</kwd><kwd>коммутативное локальное кольцо</kwd><kwd>идемпотент</kwd><kwd>$q$-потент</kwd><kwd>кольцо Галуа</kwd><kwd>нильпотентный идеал</kwd></kwd-group><kwd-group xml:lang="en"><kwd>matrix ring</kwd><kwd>commutative local ring</kwd><kwd>idempotent</kwd><kwd>$q$-potent</kwd><kwd>Galois ring</kwd><kwd>nilpotent ideal</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа поддержана грантом Российского научного фонда и Кабинета Министров Республики Татарстан (проект № 23-21-10086).</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">Hirano Y., Tominaga H. Rings in which every element is the sum of two idempotents, Bull. Aust. Math. Soc. 37 (2), 161–164 (1988).</mixed-citation><mixed-citation xml:lang="en">Hirano Y., Tominaga H. Rings in which every element is the sum of two idempotents, Bull. Aust. Math. Soc. 37 (2), 161–164 (1988).</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Tang G., Zhou Y., Su H. Matrices over a commutative ring as sums of three idempotents or three involutions, Linear Multilinear Algebra 67 (2), 267–277 (2019).</mixed-citation><mixed-citation xml:lang="en">Tang G., Zhou Y., Su H. Matrices over a commutative ring as sums of three idempotents or three involutions, Linear Multilinear Algebra 67 (2), 267–277 (2019).</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Ying Z., Ko¸san T., Zhou Y. Rings in which every element is a sum of two tripotents, Canad. Math. Bull. 59 (3), 661–672 (2016).</mixed-citation><mixed-citation xml:lang="en">Ying Z., Ko¸san T., Zhou Y. Rings in which every element is a sum of two tripotents, Canad. Math. Bull. 59 (3), 661–672 (2016).</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Zhou Y. Rings in which elements are sum of nilpotents, idempotents and tripotents, J. Algebra Appl. 17 (1), 1850009 (2018).</mixed-citation><mixed-citation xml:lang="en">Zhou Y. Rings in which elements are sum of nilpotents, idempotents and tripotents, J. Algebra Appl. 17 (1), 1850009 (2018).</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Абызов А.Н., Тапкин Д.Т. Кольца, матрицы на которыми представимы в виде суммы идемпотентной матрицы и q-потентной матрицы, Сиб. матем. журн. 62 (1), 3–18 (2021).</mixed-citation><mixed-citation xml:lang="en">Абызов А.Н., Тапкин Д.Т. Кольца, матрицы на которыми представимы в виде суммы идемпотентной матрицы и q-потентной матрицы, Сиб. матем. журн. 62 (1), 3–18 (2021).</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Абызов А.Н. Строго q-ниль-чистые кольца, Сиб. матем. журн. 60 (2), 257–273 (2019).</mixed-citation><mixed-citation xml:lang="en">Абызов А.Н. Строго q-ниль-чистые кольца, Сиб. матем. журн. 60 (2), 257–273 (2019).</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Abyzov A.N., Tapkin D.T. On rings with xn — x nilpotent, J. Algebra Appl. 21 (6), 2250111 (2022).</mixed-citation><mixed-citation xml:lang="en">Abyzov A.N., Tapkin D.T. On rings with xn — x nilpotent, J. Algebra Appl. 21 (6), 2250111 (2022).</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Tang G., Zhou Y. An embedding theorem on triangular matrix rings, Linear Multilinear Algebra 65 (5), 882–890 (2017).</mixed-citation><mixed-citation xml:lang="en">Tang G., Zhou Y. An embedding theorem on triangular matrix rings, Linear Multilinear Algebra 65 (5), 882–890 (2017).</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">McDonald B.R. Finite Rings with Identity (Marcel Dekker, New York, NY, USA, 1974).</mixed-citation><mixed-citation xml:lang="en">McDonald B.R. Finite Rings with Identity (Marcel Dekker, New York, NY, USA, 1974).</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Deng G., Somer M. On the symmetric digraphs from the kth power mapping on finite commutative rings, Discr. Math. Algorithms Appl. 7 (1), 1450064 (2015).</mixed-citation><mixed-citation xml:lang="en">Deng G., Somer M. On the symmetric digraphs from the kth power mapping on finite commutative rings, Discr. Math. Algorithms Appl. 7 (1), 1450064 (2015).</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
