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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="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Contemporary Mathematics. Fundamental Directions</journal-id><journal-title-group><journal-title xml:lang="en">Contemporary Mathematics. Fundamental Directions</journal-title><trans-title-group xml:lang="ru"><trans-title>Современная математика. Фундаментальные направления</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2413-3639</issn><issn publication-format="electronic">2949-0618</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">32581</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>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Elliptic G-Operators on Manifolds with Isolated Singularities</article-title><trans-title-group xml:lang="ru"><trans-title>Эллиптические G-операторы на многообразиях с изолированными особенностями</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Savin</surname><given-names>A. Yu.</given-names></name><name xml:lang="ru"><surname>Савин</surname><given-names>А. Ю.</given-names></name></name-alternatives><email>antonsavin@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sternin</surname><given-names>B. Yu.</given-names></name><name xml:lang="ru"><surname>Стернин</surname><given-names>Б. Ю.</given-names></name></name-alternatives><email>sternin@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Peoples’ Friendship University of Russia</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2016-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2016</year></pub-date><volume>59</volume><issue-title xml:lang="en">VOL 59, NO (2016)</issue-title><issue-title xml:lang="ru">ТОМ 59, № (2016)</issue-title><fpage>173</fpage><lpage>191</lpage><history><date date-type="received" iso-8601-date="2022-11-14"><day>14</day><month>11</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Contemporary Mathematics. Fundamental Directions</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Современная математика. Фундаментальные направления</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Contemporary Mathematics. Fundamental Directions</copyright-holder><copyright-holder xml:lang="ru">Современная математика. Фундаментальные направления</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/CMFD/article/view/32581">https://journals.rudn.ru/CMFD/article/view/32581</self-uri><abstract xml:lang="en">We study elliptic operators on manifolds with singularities such that a discrete group G acts on the manifold. Following the standard elliptic theory approach, we de ne the Fredholm property of an operator by its principal symbol. For this problem, we prove that the symbol is a pair consisting of the symbol on the principal stratum (the inner symbol) and the symbol at the conical point (the conormal symbol). We establish the Fredholm property of elliptic elements.</abstract><trans-abstract xml:lang="ru">В работе изучаются эллиптические операторы на многообразиях с особенностями в ситуации, когда на многообразии действует дискретная группа G. Как обычно в эллиптической теории, фредгольмовость оператора определяется главным символом. Мы показываем, что в данной ситуации символ является парой, состоящей из символа на основном страте (внутренний символ) и символа в конической точке (конормальный символ). Установлена фредгольмовость эллиптических элементов.</trans-abstract></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Агранович М. С., Вишик М. И. Эллиптические задачи с параметром и параболические задачи общего вида// Усп. мат. наук. - 1964. - 19, № 3. - С. 53-161.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Кондратьев В. А. Краевые задачи для эллиптических уравнений в областях с коническими и угловыми точками// Тр. Моск. Мат. об-ва. - 1967. - 16. - С. 209-292.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Назайкинский В. Е., Савин А. Ю., Стернин Б. Ю. Псевдодифференциальные операторы на стратифицированных многообразиях. II// Дифф. уравн. - 2007. - 43, № 5. - С. 685-696.</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Стернин Б. Ю. Квазиэллиптические операторы на бесконечном цилиндре. - М.: МИЭМ, 1972.</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Стернин Б. Ю. Эллиптическая теория на компактных многообразиях с особенностями. - М.: МИЭМ, 1974.</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Савин А. Ю. О символе нелокальных операторов в пространствах Соболева// Дифф. уравн. - 2011. - 47, № 6. - С. 890-893.</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Antonevich A., Belousov M., Lebedev A. Functional di erential equations. II. C∗-applications. Ч. 1, 2. - Harlow: Longman, 1998.</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Antonevich A., Lebedev A. Functional di erential equations. I. C∗-theory. - Harlow: Longman, 1994.</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Nazaikinskii V. E., Savin A. Yu., Schulze B.-W., Sternin B. Yu. Elliptic theory on singular manifolds. - Boca Raton: CRC-Press, 2005.</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Nazaikinskii V. E., Savin A. Yu., Sternin B. Yu. Elliptic theory and noncommutative geometry. - Basel: Birkha¨user, 2008.</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Nazaikinskii V., Savin A., Sternin B. Elliptic theory on manifolds with corners. I. Dual manifolds and pseudodi erential operators// В сб.: C∗-algebras and elliptic theory. II. - Basel: Birkha¨user, 2008. - С. 183-206.</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Pedersen G. K. C∗-Algebras and their automorphism groups. - London-New York: Academic Press, 1979.</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Savin A. Yu., Sternin B. Yu. Uniformization of nonlocal elliptic operators and KK-theory// Russ. J. Math. Phys. - 2013. - 20, № 3. - С. 345-359.</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Savin A. Yu., Sternin B. Yu. Elliptic theory for operators associated with di eomorphisms of smooth manifolds// В сб.: Pseudo-di erential operators, generalized functions and asymptotics. Selected papers of the 8th ISAAC congress, Moscow, Russia, August 22-27, 2011. - Basel: Birkha¨user, 2013. - С. 1-26.</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>Savin A. Yu., Sternin B. Yu. Index of elliptic operators for di eomorphisms of manifolds//j. Noncommut. Geom. - 2014. - 8, № 3. - С. 695-734.</mixed-citation></ref></ref-list></back></article>
