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  <front>
    <journal-meta>
      <journal-id journal-id-type="issn">2411-3336</journal-id>
      <journal-id journal-id-type="eissn">2541-9404</journal-id>
      <journal-title-group>
        <journal-title xml:lang="ru">Записки Горного института</journal-title>
        <journal-title xml:lang="en">Journal of Mining Institute</journal-title>
      </journal-title-group>
      <publisher>
        <publisher-name xml:lang="ru">Санкт-Петербургский горный университет императрицы Екатерины ΙΙ</publisher-name>
        <publisher-name xml:lang="en">Empress Catherine II Saint Petersburg Mining University</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-15341</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/15341</article-id>
      <article-categories/>
      <title-group>
        <article-title xml:lang="en">Linear primacy of curved surfaces of the 2nd order (conoseconds), determined by one of them and the plane</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Линейная прима кривых поверхностей 2-го порядка (коносекунд), определяемая одного из них и плоскостью</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Fedorov</surname>
            <given-names>Ye. S.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Федоров</surname>
              <given-names>Е. С.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Fedorov</surname>
              <given-names>Ye. S.</given-names>
            </name>
          </name-alternatives>
          <email>pmi@spmi.ru</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru"> (Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en"> (Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="1908-12-25">
        <day>25</day>
        <month>12</month>
        <year>1908</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>1908</year>
      </pub-date>
      <volume>1</volume>
      <issue>5</issue>
      <fpage>394</fpage>
      <lpage>396</lpage>
      <history>
        <date date-type="received" iso-8601-date="1908-07-23">
          <day>23</day>
          <month>07</month>
          <year>1908</year>
        </date>
        <date date-type="accepted" iso-8601-date="1908-09-18">
          <day>18</day>
          <month>09</month>
          <year>1908</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="1908-12-25">
          <day>25</day>
          <month>12</month>
          <year>1908</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 1908 Е. С. Федоров</copyright-statement>
        <copyright-statement xml:lang="en">© 1908 Ye. S. Fedorov</copyright-statement>
        <copyright-year>1908</copyright-year>
        <copyright-holder xml:lang="ru">Е. С. Федоров</copyright-holder>
        <copyright-holder xml:lang="en">Ye. S. Fedorov</copyright-holder>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="ru">
          <license-p>Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0)</license-p>
        </license>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="en">
          <license-p>This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0)</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/15341">https://pmi.spmi.ru/pmi/article/view/15341</self-uri>
      <abstract xml:lang="ru">
        <p>Так как плоскость Р есть лишь частный случай кривой поверхности 2-го порядка (коносекунды) К, то по таковой и еще какой-либо коносекунде, данной совершенно произвольно, вполне однозначно определяется их линейная прима. Таковою будет совокупность, для определения которой эти данные являются достаточными и могут быть заменены любыми двумя коносекундами той же совокупности.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>Since the plane P is only a special case of a curved surface of the 2nd order (conosecond) K, then from this and some other conosecond, given completely arbitrarily, their linear primacy is quite unambiguously determined. Such will be the aggregate for the determination of which these data are sufficient and can be replaced by any two conoseconds of the same aggregate.</p>
      </abstract>
    </article-meta>
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        <label>1</label>
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