Results 21 to 30 of about 26,644,987 (330)
Rational group ring elements with kernels having irrational dimension [PDF]
, 2009 We prove that there are examples of finitely generated groups Γ together with group ring elements Q∈ℚΓ for which the von Neumann dimension dimLΓ ker Q is irrational, thus (in conjunction with other known results) answering a question of Atiyah.
Tim Austin
semanticscholar +1 more source
Inner and Outer Derivations of FV8n [PDF]
Advances in Group Theory and ApplicationsLet F be a field of characteristic 0 or an odd rational prime p. In this article, we give an explicit classification of all the inner and outer derivations of the group algebra FV8n, where V8n is a group of order 8n (n a positive integer).
Praveen Manju, Rajendra Kumar Sharma
doaj +1 more source
Advances in Civil Engineering, 2021 Numerical modeling is an effective and efficient method to investigate the stress distributions of backfill in stopes, which should be well understood in underground mining. Interface elements between backfill and rock in simulated stopes had been proved
Guangsheng Liu, Xiaocong Yang, Lijie Guo
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Grothendieck Groups of Invariant Rings and of Group Rings
Journal of Algebra, 1994 Let \(G\) be a finite group acting as automorphisms of a (right) Noetherian ring \(S\), and \(R = S^ G\) be the fixed ring under this action. There is a Morita context linking the skew group ring \(T = S * G\) with \(R\), via the bimodules \(tT\) and \(Tt\) where \(t = \sum_{g \in G} g\). Suppose that the trace map \(\text{tr} : S \to R\) is surjective.
Brown, K.A., Lorenz, M.
openaire +2 more sources
More on the Schur group of a commutative ring
International Journal of Mathematics and Mathematical Sciences, 1985 The Schur group of a commutative ring, R, with identity consists of all classes in the Brauer group of R which contain a homomorphic image of a group ring RG for some finite group G.
R. A. Mollin
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Growth trap of public freight villages in Europe
Cogent Business & Management, 2022 Freight Villages (FV) are important nodes in supply chains and can be seen as industrial and trade zones with good connections to transport networks, such as road, rail and air, offering basic logistics services, such as warehousing and transshipment, as
Yilmaz Uygun, Mohammad Niyayesh
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Zassenhaus conjecture for central extensions of S5 [PDF]
, 2008 We confirm a conjecture of Zassenhaus about rational conjugacy of torsion units in integral group rings for a covering group of the symmetric group S5 and for the general linear group GLð2; 5Þ. The first result, together with others from the literature,
Bódi, Viktor +4 more
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ON-SITE SEMANTIC MAPPING OF ARCHAEOLOGICAL EXCAVATION AREAS [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2013 3D laser scanning is the state of the art in modeling archaeological excavation sites, historical sites and even entire cities or landscapes. The documentation of findings on an excavation site is an essential archaeological task.
H. Houshiar +5 more
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Cohomology of Hyperplane Complements with Group Ring Coefficients [PDF]
, 2010 We compute the cohomology with group ring coecients of the complement of a nite collection of ane hyperplanes in C n .
M. Davis +3 more
semanticscholar +1 more source
Hopfian additive groups of rings [PDF]
Известия Саратовского университета. Новая серия: Математика. Механика. ИнформатикаA group is called Hopfian if it is not isomorphic to any of its proper factor groups, or, equivalently, any of its epimorphisms on itself is an isomorphism, i.e., an automorphism. This property was first proved by the Swiss mathematician H.
Kaigorodov, Evgeniy Vladimirovich
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