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<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "https://jats.nlm.nih.gov/publishing/1.3/JATS-journalpublishing1-3.dtd">
<article article-type="research-article" dtd-version="1.3" xml:lang="ru">
  <front xmlns:xlink="http://www.w3.org/1999/xlink">
    <journal-meta>
      <journal-title-group>
        <journal-title>St. Petersburg Polytechnic University Journal: Physics and Mathematics</journal-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Научно-технические ведомости СПбГПУ. Физико-математические науки</trans-title>
        </trans-title-group>
      </journal-title-group>
      <issn pub-type="epub">2304-9782, 2618-8686, 2405-7223</issn>
    </journal-meta>
    <article-meta xmlns:xlink="http://www.w3.org/1999/xlink">
      <article-id pub-id-type="publisher-id">6</article-id>
      <article-id pub-id-type="doi">10.18721/JPM.13206</article-id>
      <title-group>
        <article-title>General formulas for chains of fundamental mutually homogeneous functions with a common pair of complex conjugate eigenvalues</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Общие формулы для цепочек фундаментальных взаимно-однородных функций с общей парой комплексно- сопряженных собственных чисел</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <contrib-id contrib-id-type="orcid">0000-0003-0985-5964</contrib-id>
          <name>
            <surname>Berdnikov</surname>
            <given-names>Alexander</given-names>
          </name>
          <xref ref-type="aff" rid="aff1"/>
          <email>asberd@yandex.ru</email>
        </contrib>
        <contrib contrib-type="author">
          <contrib-id contrib-id-type="orcid">0000-0003-3514-8577</contrib-id>
          <name>
            <surname>Solovyev</surname>
            <given-names>Konstantin</given-names>
          </name>
          <xref ref-type="aff" rid="aff2"/>
          <email>k-solovyev@mail.ru</email>
        </contrib>
        <contrib contrib-type="author">
          <contrib-id contrib-id-type="orcid">0000-0002-6162-9481</contrib-id>
          <name>
            <surname>Krasnova</surname>
            <given-names>Nadezhda</given-names>
          </name>
          <xref ref-type="aff" rid="aff2"/>
          <email>n.k.krasnova@mail.ru</email>
        </contrib>
      </contrib-group>
      <aff id="aff1">Institute for Analytical Instrumentation of the RAS</aff>
      <aff id="aff2">Peter the Great St. Petersburg Polytechnic University</aff>
      <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2020-06-29">
        <day>29</day>
        <month>06</month>
        <year>2020</year>
      </pub-date>
      <volume>13</volume>
      <issue>2</issue>
      <fpage>72</fpage>
      <lpage>88</lpage>
      <self-uri xmlns:xlink="http://www.w3.org/1999/xlink" content-type="pdf" xlink:href="https://physmath.spbstu.ru/userfiles/files/articles/2020/2/6_72-88_13(2)2020.pdf"/>
      <abstract xml:lang="en">
        <p>This work continues our studies in properties of mutually homogeneous functions (MHFs), being a generalization of Euler homogeneous functions and can be used in the synthesis of electric and magnetic fields of electron and ion-optical systems with special properties. MHFs corresponding to multiple pairs of complex conjugate eigenvalues of the matrix of basic functional equations have been considered in addition to MHF chains corresponding to multiple real eigenvalues of the matrix of basic functional relations. Functional equations characterizing such functions were deduced, general formulas for the MHFs with complex conjugate multiple eigenvalues were derived.</p>
      </abstract>
      <kwd-group xml:lang="en">
        <kwd>functional equation</kwd>
        <kwd>homogeneous function</kwd>
        <kwd>associated homogeneous function</kwd>
        <kwd>mutually homogeneous functions</kwd>
      </kwd-group>
    </article-meta>
  </front>
</article>
