<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<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">32582</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">Magnetic Schro¨dinger Operator from the Point of View of Noncommutative Geometry</article-title><trans-title-group xml:lang="ru"><trans-title>Магнитный оператор Шредингера с точки зрения некоммутативной геометрии</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sergeev</surname><given-names>A. G.</given-names></name><name xml:lang="ru"><surname>Сергеев</surname><given-names>А. Г.</given-names></name></name-alternatives><email>sergeev@mi.ras.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Steklov Mathematical Institute</institution></aff><aff><institution xml:lang="ru">Математический институт им. В. А. Стеклова</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>192</fpage><lpage>200</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/32582">https://journals.rudn.ru/CMFD/article/view/32582</self-uri><abstract xml:lang="en">We give an interpretation of magnetic Schro¨dinger operator in terms of noncommutative geometry. In particular, spectral properties of this operator are reformulated in terms of C∗-algebras. Using this reformulation, one can employ the machinery of noncommutative geometry, such as Hochschild cohomology, to study the properties of magnetic Schro¨dinger operator. We show how this idea can be applied to the integer quantum Hall e ect.</abstract><trans-abstract xml:lang="ru">Мы приводим интерпретацию магнитного оператора Шредингера в терминах некоммутативной геометрии. В частности, спектральные свойства оператора переформулируются в терминах C∗-алгебры. Используя эту переформулировку, можно применять такую технику некоммутативной геометрии, как когомология Хохшильда, к изучению свойств магнитного оператора Шредингера. Показано, что эта идея может быть применена к целочисленному квантовому эффекту Холла.</trans-abstract></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Bellissard J., van Elst A., Schulz-Baldes H. The noncommutative geometry of the quantum Hall e ect//j. Math. Phys. - 1994. - 35. - C. 5373-5451.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Berezin F. A., Shubin V. A. The Schro¨dinger equation. - Boston: Kluwer, 1991.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Connes A. Noncommutative geometry. - San Diego: Academic Press, 1994.</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Gruber M. Noncommutative Bloch theory//j. Math. Phys. - 2001. - 42. - С. 2438-2465.</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Husemoller D. Fibre bundles. - New York: Springer, 1994.</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Kordyukov Yu., Mathai V., Shubin M. A. Equivalence of spectral properties in semiclassical limit and a vanishing theorem for higher traces in K-theory//j. Reine Angew. Math. - 2005. - 581. - C. 193-236.</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Laughlin B. Quantized Hall conductivity in two dimensions// Phys. Rev. - 1981. - B23. - С. 5232.</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Thouless D. J., Kohmono M., Nightingale M. P., den Nijs M. Quantized Hall conductance in a twodimensional periodic potential// Phys. Rev. Lett. - 1982. - 49. - C. 405-408.</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Xia J. Geometric invariants of the quantum Hall e ect// Commun. Math. Phys. - 1988. - 119.- C. 29- 50.</mixed-citation></ref></ref-list></back></article>
