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<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Archiving and Interchange DTD with OASIS Tables with MathML3 v1.4 20241031//EN" "https://jats.nlm.nih.gov/archiving/1.4/JATS-archive-oasis-article1-4-mathml3.dtd">
<article xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" dtd-version="1.4" article-type="research-article" xml:lang="en"><front><journal-meta><journal-title-group><journal-title xml:lang="ru">Математическая физика и компьютерное моделирование</journal-title></journal-title-group><issn publication-format="print">2587-6325</issn><issn publication-format="electronic">2587-6902</issn></journal-meta><article-meta><article-id pub-id-type="doi">10.15688/mpcm.jvolsu.2024.3.5</article-id><article-categories><subj-group><subject>Other</subject></subj-group></article-categories><title-group><article-title xml:lang="ru">О ФУНКЦИОНАЛЕ ГАУССОВОЙ КРИВИЗНЫ В КЛАССЕ ПОВЕРХНОСТЕЙ ПОЛОЖИТЕЛЬНОЙ ГАУССОВОЙ КРИВИЗНЫ</article-title><trans-title-group xml:lang="en"><trans-title>ON THE GAUSSIAN CURVATURE FUNCTIONAL IN THE CLASS OF SURFACES OF POSITIVE GAUSSIAN CURVATURE</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Щербаков</surname><given-names>Евгений Александрович</given-names></name><name xml:lang="en"><surname>Shcherbakov</surname><given-names>Eugeniy</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><email>echt@math.kubsu.ru</email></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Щербаков</surname><given-names>Михаил Евгеньевич</given-names></name><name xml:lang="en"><surname>Shcherbakov</surname><given-names>Mikhail</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><email>latiner@mail.ru</email></contrib><aff-alternatives id="aff1"><aff xml:lang="en"><institution>Kuban State University (Krasnodar,, Russian Federation)</institution></aff><aff xml:lang="ru"><institution>Кубанский государственный университет (Краснодар,, Российская Федерация)</institution></aff></aff-alternatives></contrib-group><pub-date pub-type="epub" iso-8601-date="2024-01-05"><day>05</day><month>01</month><year>2024</year></pub-date><volume>27</volume><issue>3</issue><fpage>60</fpage><lpage>66</lpage><history><date date-type="received" iso-8601-date="2024-08-06"><day>06</day><month>08</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-08-23"><day>23</day><month>08</month><year>2024</year></date></history><permissions><license xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:title="CC BY 4.0"><ali:license_ref>https://creativecommons.org/licenses/by/4.0/</ali:license_ref><license-p xml:lang="ru">CC BY 4.0</license-p></license></permissions><abstract xml:lang="ru"><p>В работе устанавливается вид функционала гауссовой кривизны, определенного на классе бесконечно дифференцируемых горизонтальных поверхностей положительной гауссовой кривизны. Относительно таких поверхностей предполагается, что они допускают глобальную полугеодезическую параметризацию. В работе доказывается, что первая вариация функционала на классе вариаций допустимых поверхностей, у которых возможны связи между коэффициентами первой квадратичной формы и их геодезическими линиями, аналогичные осесимметричному случаю, определяется гауссовой кривизной варьируемой поверхности.</p></abstract><abstract xml:lang="en" abstract-type="summary"><p>The paper establishes the form of the Gaussian curvature functional defined on the class of infinitely differentiable horizontal surfaces of positive Gaussian curvature. With respect to admissible surfaces, it is assumed that they admit a global semi-geodetic parametrization. The paper proves that the first variation of the functional on the class of variations of admissible surfaces admitting connections between the coefficients of the first quadratic form and their geodesic lines similar to the axisymmetric case is determined by the Gaussian curvature of the varied surface. The considerations of the type are closely connected with the problems of the study of the equilibrium forms having one of the main curvatures sufficiently small. In this case, the classical Laplace formula fails. Thus, there appear a necessity to take into account more subtle processes leading to the adequate description of the equilibrium state of the two-phased system. In particular, it is quite natural to introduce into the study an intermediate layer consisting of the molecules of the two different phases, one of the Maxwell’s ideas. The calculations of the work spended by the pressure forces for the formation of intermediate layer leads us to the necessity to introduce Gauss functional into consideration. Linear combination of mean curvature and gaussian curvature functionals gives possibility to construct variational solution of generalized Laplace equation.</p></abstract><kwd-group xml:lang="ru"><kwd>гауссова кривизна</kwd><kwd>функционал гауссовой кривизны</kwd><kwd>глобальная полугеодезическая параметризация</kwd><kwd>квазиконформные отображения</kwd><kwd>уравнение Монжа — Ампера</kwd><kwd>геодезическая линия</kwd><kwd>уравнение средней кривизны</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Gaussian curvature</kwd><kwd>Gaussian curvature functional</kwd><kwd>global semigeodesic parametrization</kwd><kwd>quasiconformal mappings</kwd><kwd>Monge — Ampere equation</kwd><kwd>geodesic line</kwd><kwd>mean curvature equation</kwd></kwd-group></article-meta></front><back><ref-list><ref id="ref1"><mixed-citation publication-type="other" xml:lang="ru">Векуа, И. Н. Обобщенные аналитические функции / И. Н. 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