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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">cheb</journal-id><journal-title-group><journal-title xml:lang="ru">Чебышевский сборник</journal-title><trans-title-group xml:lang="en"><trans-title>Chebyshevskii Sbornik</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-8383</issn><publisher><publisher-name>Tula State Lev Tolstoy  Pedagogical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22405/2226-8383-2023-24-4-191-205</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1600</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><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Article</subject></subj-group></article-categories><title-group><article-title>О биективных функциях от фиксированных переменных в поле Галуа из 𝑝^𝑘 элементов и на кольце целых 𝑝-адических чисел для нечетного простого числа 𝑝</article-title><trans-title-group xml:lang="en"><trans-title>On Bijective Functions of Fixed Variables in the Galois Field of 𝑝^𝑘 Elements and on the Ring of 𝑝-Adic Integers for an Odd Prime Number 𝑝</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>Лопес</surname><given-names>Перес Аниэль</given-names></name><name name-style="western" xml:lang="en"><surname>Lopez</surname><given-names>Perez Aniel’</given-names></name></name-alternatives><bio xml:lang="ru"><p>магистр, специалист по информационной безопасности</p></bio><bio xml:lang="en"><p>Master’s degree in Telematics, Information Security specialist</p></bio><email xlink:type="simple">alopezp1990@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Куэльяр</surname><given-names>Хустис Ористела</given-names></name><name name-style="western" xml:lang="en"><surname>Cuellar</surname><given-names>Justiz Oristela</given-names></name></name-alternatives><bio xml:lang="ru"><p>выпускница математического факультета Тульского государственного педагогического института им. Л. Н. Толстого, доктор математических наук, профессор, магистр наук в области прикладной математики</p></bio><bio xml:lang="en"><p>graduate student of the Faculty of Mathematics of the Tula StateLev Tolstoy Pedagogical Institute, master’s degree in Applied Mathematics, doctor of mathematical sciences, professor</p></bio><email xlink:type="simple">oristelacj@uci.cu</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Центральный университет провинции Лас-Вильяс «Марта Абреу» (Куба ,г. Санта-Клара); Московский государственный университет им. М. В. Ломоносова (г. Москва)</institution><country>Куба</country></aff><aff xml:lang="en"><institution>Central University “Marta Abreu” of Las Villas (Kyba, Santa Clara); Faculty of Computational Mathematics and Cybernetics; Lomonosov Moscow State University</institution><country>Cuba</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>выпускница математического факультета Тульского государственного педагогического института им. Л. Н. Толстого (г. Тула); Университет компьютерных наук (Куба, г. Гавана)</institution><country>Куба</country></aff><aff xml:lang="en"><institution>Tula State Lev Tolstoy Pedagogical Institute; University of Informatics Sciences (Kuba, Havana).</institution><country>Cuba</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>25</day><month>01</month><year>2024</year></pub-date><volume>24</volume><issue>4</issue><fpage>191</fpage><lpage>205</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Лопес П.А., Куэльяр Х.О., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Лопес П.А., Куэльяр Х.О.</copyright-holder><copyright-holder xml:lang="en">Lopez P.A., Cuellar J.O.</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://www.chebsbornik.ru/jour/article/view/1600">https://www.chebsbornik.ru/jour/article/view/1600</self-uri><abstract><p>В настоящей работе даются необходимые и достаточные условия, при которых функция от фиксированных переменных 𝜓: F^(𝑖+1)_𝑞 → F_𝑞 является биективной, где 𝑖 ∈ N ∪ {0}, F^(𝑖+1)_𝑞 —(𝑖 + 1)-я декартова степень поля Галуа F𝑞 из 𝑞 = 𝑝^𝑘 элементов, 𝑝 — нечетное простое число, и 𝑘 ∈ N. Кроме того, используются такие условия биективных функций 𝜓 от фиксированных переменных, чтобы написать критерий, сохраняющих меру Хаара из важного класса 1-липшицевых функций в терминах их координатных функций на кольце целых 𝑝-адических чисел Z𝑝,     𝑝 ̸= 2. В частности, представление 1-липшицевых функцийв терминах их координатных функций на кольце целых 2-адических чисел Z_2 оказалось общим и полезным инструментом для получения математических результатов, прикладываемых в криптографии. В этой работе продолжается исследование такого представления 1-липшицевых функций на кольце целых 𝑝-адических Z_𝑝 при 𝑝 ̸= 2 с особым вниманием к представлению биективных 1-липшицевых функций в терминах их координатныхфункций на Z_𝑝, 𝑝 ̸= 2.</p></abstract><trans-abstract xml:lang="en"><p>In this paper there are given necessary and sufficient conditions under which a function of fixed variables 𝜓: F^(𝑖+1)_𝑞 → F_𝑞 is bijective, where 𝑖 ∈ N ∪ {0}, F(𝑖+1)_𝑞 is the (𝑖 + 1)-ary Cartesian power of the Galois field F_𝑞 of 𝑞 = 𝑝^𝑘 elements, 𝑝 is an odd prime number and 𝑘 ∈ N. In addition, such conditions of the bijective functions 𝜓 of fixed variables are used to write a criterion for the preserving Haar measure of functions from the important class of 1-Lipschitz functions in terms of its coordinate functions on the ring of 𝑝-adic integers Z_𝑝, 𝑝 ̸= 2. In particular, the representation of 1-Lipschitz functions in terms of its coordinate functions on the ring of 2-adic integers Z_2 turned out to be a general and useful tool for obtaining mathematical results applied in cryptography. In this work, the research of such representation of 1-Lipschitz functions on the ring of 𝑝-adic integers Z_𝑝, 𝑝 ̸= 2 is being continued, with special attention to the representation of bijective 1-Lipschitz functions in terms of its coordinate functions on Z_𝑝, 𝑝 ̸= 2.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>поле Галуа</kwd><kwd>биективная функция</kwd><kwd>1-липшицева функция</kwd><kwd>координатная функция</kwd><kwd>функция</kwd><kwd>сохраняющая меру Хаара.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Galois field</kwd><kwd>bijective function</kwd><kwd>1-Lipschitz function</kwd><kwd>Haar measure</kwd><kwd>Haar measurepreserving function</kwd><kwd>coordenate function</kwd><kwd>ergodic function.</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено в МГУ им. М. В. 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