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			<front>
			<journal-meta>
				<journal-id journal-id-type="ojs">vestnik</journal-id>
				<journal-title-group>
					<journal-title xml:lang="ru">Экологический вестник научных центров Черноморского экономического сотрудничества</journal-title>
					<trans-title-group xml:lang="en">
						<trans-title>Ecological Bulletin of Research Centers of the Black Sea Economic Cooperation</trans-title>
					</trans-title-group>
				</journal-title-group>
			<issn pub-type="ppub">1729-5459</issn>
			<publisher>
				<publisher-name>Кубанский государственный университет</publisher-name>
				<publisher-loc>RU</publisher-loc>
			</publisher>
			<self-uri xlink:href="https://vestnik.kubsu.ru/" />
		</journal-meta>
		<article-meta>
			<article-id pub-id-type="publisher-id">752</article-id>
			<article-categories>
				<subj-group xml:lang="ru" subj-group-type="heading"><subject>Научная статья</subject></subj-group>
				<subj-group xml:lang="en" subj-group-type="heading"><subject>Original article</subject></subj-group>
				<subj-group xml:lang="ru"><subject>Математика</subject></subj-group>
				<subj-group xml:lang="en"><subject>Mathematics</subject></subj-group>
			</article-categories>
			<title-group>
				<article-title xml:lang="en">On functional of Gauss curvature</article-title>
				<trans-title-group xml:lang="ru">
					<trans-title>О функционале гауссовой кривизны</trans-title>
					</trans-title-group>
			</title-group>
			<contrib-group content-type="author">
				<contrib >
					<name-alternatives>
						<string-name specific-use="display">Shcherbakov E.A.</string-name>
						<name name-style="western" specific-use="primary" xml:lang="en">
							<surname>Shcherbakov</surname>
							<given-names>Evgeniy A.</given-names>
						</name>
						<name name-style="western" xml:lang="ru">
							<surname>Щербаков</surname>
							<given-names>Евгений Александрович</given-names>
						</name>
					</name-alternatives>
					<xref ref-type="aff" rid="aff-1" />
					<email>echt@math.kubsu.ru</email>
					<bio xml:lang="ru"><p>профессор кафедры теории функций Кубанского государственного университета</p></bio>
				</contrib>
				<contrib >
					<name-alternatives>
						<string-name specific-use="display">Shcherbakov M.E.</string-name>
						<name name-style="western" specific-use="primary" xml:lang="en">
							<surname>Shcherbakov</surname>
							<given-names>Mikhail E.</given-names>
						</name>
						<name name-style="western" xml:lang="ru">
							<surname>Щербаков</surname>
							<given-names>Михаил Евгеньевич</given-names>
						</name>
					</name-alternatives>
					<xref ref-type="aff" rid="aff-1" />
					<email>latiner@mail.ru</email>
					<bio xml:lang="ru"><p>преподаватель кафедры функционального анализа и алгебры Кубанского государственного университета</p></bio>
				</contrib>
			</contrib-group>
			<aff id="aff-1"><institution content-type="orgname" xml:lang="en">Kuban State University, Krasnodar</institution><institution content-type="orgname" xml:lang="ru">Кубанский государственный университет, Краснодар</institution></aff>
			<pub-date date-type="pub" iso-8601-date="2017-12-25" publication-format="ppub">
				<day>25</day>
				<month>12</month>
				<year>2017</year>
			</pub-date>
			<issue>4</issue>
				<fpage>5</fpage>
				<lpage>12</lpage>
			<history>
				<date date-type="received" iso-8601-date="2017-10-07">
					<day>07</day>
					<month>10</month>
					<year>2017</year>
				</date>
				<date date-type="accepted" iso-8601-date="2017-10-15">
					<day>15</day>
					<month>10</month>
					<year>2017</year>
				</date>
				<date date-type="pub" iso-8601-date="2017-12-25">
					<day>25</day>
					<month>12</month>
					<year>2017</year>
				</date>
			</history>
			<permissions>
				<copyright-statement>Copyright (c) 2017 Щербаков Е.А., Щербаков М.Е.</copyright-statement>
				<copyright-year>2017</copyright-year>
				<copyright-holder>Щербаков Е.А., Щербаков М.Е.</copyright-holder>
				<license xlink:href="https://creativecommons.org/licenses/by/4.0">
					<license-p>This work is licensed under a Creative Commons Attribution 4.0 International License.</license-p>
				</license>
			</permissions>
			<self-uri xlink:href="https://vestnik.kubsu.ru/article/view/752" />
			<abstract xml:lang="en">
				<p>The authors study the problem of constructing a Gauss curvature functional whose variation on admissible surface is determined by its gauss curvature. In their previous papers the functional of such a type had been found for axisymmetrical surfaces. The crucial point in its constructing was correspondence between differential properties of the function determining it and and variation of the first quadratic form of the surface. Besides it was very important that axisymmetrical surfaces admit global half-geodesic parameterization. Thus, in order to obtain functional yielding gausss curvature in the general case it was necessary to revise differential equation whose solution gave Gauss curvature functoional in axisymmetrical case. This problemm was solved by analytic continution of the solution into upper half-plane. Further the problem of global half-geodesic parameterization arises. It is yet unsolved problem in the general setting. But the authors earlier showed that continuously differentiable surfaces with positively determined first quadratic form admit almost global half geodesic parameterization, i.e. it is possible to find a familly of geodesic lines covering it up to the null Hausdorff measure. The authors following the general lines study of axisysymmetrical case deduce integral-differential equations whose solution give desirable variation of the first quadratic form . This variation in accordance with differential properties of the solution of differentiable equation for the function determining gauss functional solve the problem of gauss curvature functional for the surfaces lacking axial symmetry.</p>
			</abstract>
			<abstract xml:lang="ru">
				<p>Исходя из представления функционала, определённого на классе осесимметрических поверхностей со спрямляемыми образующими авторы конструируют функционал, определённый на классе непрерывно дифференцируемых поверхностей, допускающих почти глобальную полугеодезическую параметризацию. Авторы выводят дифференциальное уравнение, решение которого согласовано аналогично осесимметрическому случаю с вариациями длин геодезических и вариацией первой квадратичной формы так, что вариация заданного им функционала определяется гауссовой кривизной варьируемой поверхности. Авторы используют идеи, приведшие их ране к установлению вида функционала на классе осесимметрических поверхностей, чья вариация на допустимой поверхности определяется её гауссовой кривизной, для нахождения подобного функционала в классе не осесимметрических поверхностей, допускающих почти глобальную полугеодезическую параметризацию.</p>
			</abstract>
			<kwd-group xml:lang="ru">
				<kwd>упругие свойства промежуточного слоя</kwd>
				<kwd>капиллярные силы</kwd>
				<kwd>гауссова кривизна</kwd>
				<kwd>средняя кривизна</kwd>
				<kwd>символы Кристоффеля</kwd>
				<kwd>почти глобальная полу-геодезическая параметризация</kwd>
				<kwd>обобщённые аналитические функции</kwd>
			</kwd-group>
			<kwd-group xml:lang="en">
				<kwd>flexural rigidity of intermediate layer</kwd>
				<kwd>capillar forces</kwd>
				<kwd>Gauss curvature</kwd>
				<kwd>mean curvature</kwd>
				<kwd>Christoffel symbols</kwd>
				<kwd>almost global half-geodesic parameterization</kwd>
				<kwd>generalized analytic functions</kwd>
			</kwd-group>
			<counts><page-count count="8" /></counts>
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	<body></body>
	<back>
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</article>