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This article is cited in 24 scientific papers (total in 24 papers)
A smooth version of Johnson's problem on derivations of group algebras
A. A. Arutyunova, A. S. Mishchenkob a Moscow Institute of Physics and Technology, Dolgoprudny, Moscow region, Russia
b Faculty of Mechanics and Mathematics, Lomonosov Moscow State University, Moscow, Russia
Abstract:
We give a description of the algebra of outer derivations of the group algebra of a finitely presented discrete group in terms of the Cayley complex of the groupoid of the adjoint action of the group. This problem is a smooth version of Johnson's problem on derivations of a group algebra. We show that the algebra of outer derivations is isomorphic to the one-dimensional compactly supported cohomology group of the Cayley complex over the field of complex numbers.
Bibliography: 34 titles.
Keywords:
derivations, group algebras, groupoids, Cayley complexes, Hochschild cohomology.
Received: 03.04.2018 and 06.12.2018
Citation:
A. A. Arutyunov, A. S. Mishchenko, “A smooth version of Johnson's problem on derivations of group algebras”, Sb. Math., 210:6 (2019), 756–782
Linking options:
https://www.mathnet.ru/eng/sm9119https://doi.org/10.1070/SM9119 https://www.mathnet.ru/eng/sm/v210/i6/p3
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Abstract page: | 749 | Russian version PDF: | 120 | English version PDF: | 39 | References: | 46 | First page: | 28 |
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