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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">caht</journal-id><journal-title-group><journal-title xml:lang="ru">Научный вестник МГТУ ГА</journal-title><trans-title-group xml:lang="en"><trans-title>Civil Aviation High Technologies</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2079-0619</issn><issn pub-type="epub">2542-0119</issn><publisher><publisher-name>Moscow State Technical University of Civil Aviation (MSTU CA)</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">caht-858</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>КОНТАКТНЫЕ ИНТЕГРИРУЕМЫЕ РАСШИРЕНИЯ ГРУППЫ ПСЕВДОСИММЕТРИЙ И НАКРЫТИЯ R-го ДВАЖДЫ МОДИФИЦИРОВАННОГО БЕЗДИСПЕРСИОННОГОУРАВНЕНИЯ КАДОМЦЕВА - ПЕТВИАШВИЛИ</article-title><trans-title-group xml:lang="en"><trans-title>CONTACT INTEGRABLE EXTENSIONS OF SYMMETRY PSEUDO-GROUP AND COVERINGS FOR THE R-th DOUBLE MODIFIED DISPERSIONLESS KADOMTSEV-PETVIASHVILI EQUATION</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>Морозов</surname><given-names>О. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Morozov</surname><given-names>O. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>член Московского математического общества, доктор физико-математических наук, профессор кафедры высшей математики</p></bio><email xlink:type="simple">oimorozov@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>Павлов</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Pavlov</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат физико-математических наук, ведущий научный сотрудник</p></bio><email xlink:type="simple">maksmath@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>МГТУ ГА</institution><country>Russian Federation</country></aff><aff xml:lang="ru" id="aff-2"><institution>Новосибирский Государственный Университет</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>27</day><month>12</month><year>2016</year></pub-date><volume>0</volume><issue>224</issue><fpage>97</fpage><lpage>106</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Морозов О.И., Павлов М.В., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Морозов О.И., Павлов М.В.</copyright-holder><copyright-holder xml:lang="en">Morozov O.I., Pavlov M.V.</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://avia.mstuca.ru/jour/article/view/858">https://avia.mstuca.ru/jour/article/view/858</self-uri><abstract><p>Найдены контактные интегрируемые расширения группы псевдосимметрий и накрытия r-того дважды модифицированного бездисперсионного уравнения Кадомцева - Петвиашвили. Одно из накрытий приводит к преобразованию Бэклунда и оператору рекурсии для исследуемых уравнений.</p></abstract><trans-abstract xml:lang="en"><p>We find contact integrable extensions and coverings for the r-th double modified dispersionless Kadomtsev-Petviashvili law equation. One of the coverings provides a Bäcklund auto-transformation and a recursion operator for the equation under the study.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>псевдогруппа Ли</kwd><kwd>дифференциальное накрытие</kwd><kwd>контактное интегрируемое расширение</kwd><kwd>преобразование Бэклунда</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Lie pseudo-group</kwd><kwd>differential covering</kwd><kwd>contact integrable extension</kwd><kwd>Bäcklund transformation</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Błaszak M. 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