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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Fluid Dynamics</journal-id><journal-title-group><journal-title xml:lang="en">Fluid Dynamics</journal-title><trans-title-group xml:lang="ru"><trans-title>Известия Российской академии наук. Механика жидкости и газа</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1024-7084</issn><issn publication-format="electronic">3034-5340</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">672436</article-id><article-id pub-id-type="doi">10.31857/S0568528122600321</article-id><article-id pub-id-type="edn">DUFTMO</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Unknown</subject></subj-group></article-categories><title-group><article-title xml:lang="en">A Nonlinear Schrеdinger Equation for Gravity-Capillary Waves on Deep Water with Constant Vorticit</article-title><trans-title-group xml:lang="ru"><trans-title>НЕЛИНЕЙНОЕ УРАВНЕНИЕ ШРЕДИНГЕРА ДЛЯ ГРАВИТАЦИОННО-КАПИЛЛЯРНЫХ ВОЛН НА ГЛУБОКОЙ ВОДЕ С ПОСТОЯННОЙ ЗАВИХРЕННОСТЬЮ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shishina</surname><given-names>M. I.</given-names></name><name xml:lang="ru"><surname>Шишина</surname><given-names>М. И.</given-names></name></name-alternatives><email>java-jsp@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Nizhny Novgorod Planetarium named after G.M. Grechko</institution></aff><aff><institution xml:lang="ru">Нижегородский планетарий им. Г.М. Гречко</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-03-01" publication-format="electronic"><day>01</day><month>03</month><year>2023</year></pub-date><issue>2</issue><fpage>20</fpage><lpage>32</lpage><history><date date-type="received" iso-8601-date="2025-02-27"><day>27</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, М.И. Шишина</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, М.И. Шишина</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">М.И. Шишина</copyright-holder><copyright-holder xml:lang="ru">М.И. Шишина</copyright-holder></permissions><self-uri xlink:href="https://transsyst.ru/1024-7084/article/view/672436">https://transsyst.ru/1024-7084/article/view/672436</self-uri><abstract xml:lang="en"><p>The surface gravity-capillary waves on deep water with constant vorticity in the regionbounded by the free surface and the infinitely deep plane bottom are considered. A nonlinear Schrödinger equation is derived from a system of exact nonlinear integro-differential equations in conformal variables written in the implicit form taking into account surface tension. In deriving the nonlinear Schrödinger equation, the role of the mean flow is taken into account. The nonlinear Schrödinger equation is investigated for modulation instability. A soliton solution of the nonlinear Schrödinger equation that represents a soliton of the “ninth wave” type is obtained. bounded by the free surface and the infinitely deep plane bottom are considered. A nonlinear Schrödinger equation is derived from a system of exact nonlinear integro-differential equations in conformalvariables written in the implicit form taking into account surface tension. In deriving the nonlinear Schrödinger equation, the role of the mean flow is taken into account. The nonlinear Schrödinger equation is investigated for modulation instability. A soliton solution of the nonlinear Schrödinger equation that represents a soliton of the “ninth wave” type is obtained.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45181324573168">Рассматриваются поверхностные гравитационно-капиллярные волны на глубокой воде с постоянной завихренностью в области, ограниченной свободной поверхностью и бесконечно глубоким плоским дном. Из системы точных нелинейных интегро-дифференциальных уравнений в конформных переменных, записанной в неявном виде, с учетом поверхностного натяжения, выведено нелинейное уравнение Шредингера. При выводе нелинейного уравнения Шредингера учтена роль среднего течения. Нелинейное уравнение Шредингера исследовано на модуляционную неустойчивость. Получено солитонное решение нелинейного уравнения Шредингера, представляющее собой солитон типа “девятый вал”.</p></trans-abstract><kwd-group xml:lang="en"><kwd>nonlinear Schrödinger equation</kwd><kwd>surface gravity-capillary waves</kwd><kwd>vorticity</kwd><kwd>conformal variables</kwd><kwd>mean flow</kwd><kwd>modulation instability</kwd><kwd>soliton</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>нелинейное уравнение Шредингера</kwd><kwd>поверхностные гравитационно-капиллярные волны</kwd><kwd>завихренность</kwd><kwd>конформные переменные</kwd><kwd>среднее течение</kwd><kwd>модуляционная неустойчивость</kwd><kwd>солитон</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Захаров В.Е. Устойчивость периодических волн конечной амплитуды на поверхности глубокой жидкости // Журн. ПМТФ. 1968. № 2. С. 86–94.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Davey A. 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