Results 231 to 240 of about 1,597 (267)

Modular geodesics and wedge domains in non-compactly causal symmetric spaces. [PDF]

Ann Glob Anal Geom (Dordr)
Morinelli V, Neeb KH, Ólafsson G.
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On Contractions of Lie Algebras

Mathematics in Computer Science, 2016
In this paper, the authors consider the notion of contraction of Lie algebras for the class of filiform Lie algebras, i.e. nilpotent Lie algebras with a maximal nilpotence index. This analysis is carried out using the notion of generalized derivations introduced in [\textit{P. Novotný} and \textit{J. Hrivnák}, J. Geom. Phys. 58, No.
J. M. Escobar, Juan Núñez 0001, Pedro Pérez-Fernández   +2 more
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SANDWICHES IN LIE ALGEBRAS

Mathematics of the USSR-Sbornik, 1981
The author investigates Lie algebras which contain elements the squares of whose adjoint endomorphisms are zero. The basic theory is used, in particular, to improve the proof of the local nilpotence of Engel Lie algebras. Bibliography: 3 titles.
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Algebra, Lie Group and Lie Algebra

2010
Geometry, algebra, and analysis are usually called the three main branches of mathematics. This chapter introduces some fundamental results in algebra that are mostly useful in systems and control. In section 4.1 some basic concepts of group and three homomorphism theorems are discussed. Ring and algebra are introduced briefly in section 4.2. As a tool,
Daizhan Cheng, Xiaoming Hu, Tielong Shen
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DEFORMATIONS OF LIE ALGEBRAS

Mathematics of the USSR-Sbornik, 1986
In this paper general problems of the deformations of Lie algebras over a field of characteristic zero and related problems of calculating the cohomologies with coefficients in the adjoint representation are considered. The author adapts and generalizes to the case of Lie algebras the general constructions of the cohomology theory of (local ...
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Affine Lie Algebra Modules and Complete Lie Algebras

Algebra Colloquium, 2006
In this paper, we first construct some new infinite dimensional Lie algebras by using the integrable modules of affine Lie algebras. Then we prove that these new Lie algebras are complete. We also prove that the generalized Borel subalgebras and the generalized parabolic subalgebras of these Lie algebras are complete.
Gao, Yongcun, Meng, Daoji
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On the Derivation Algebras of Lie Algebras

Canadian Journal of Mathematics, 1961
LetLbe a Lie algebra over a field of characteristic 0 and letD(L)be the derivation algebra ofL, that is, the Lie algebra of all derivations ofL. Then it is natural to ask the following questions: What is the structure ofD(L)?What are the relations of the structures ofD(L)andL?
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Invariant Lie Algebras and Lie Algebras with a Small Centroid

Algebra and Logic, 2001
Let \(R\) be an algebra, \(\Gamma(R)\) be its centroid and \(A(R):=\{\phi\in\Gamma(R):\phi R\subseteq \text{Ann}(R)\}\). \(\Gamma(R)\) is called small if, for some decomposition of \(R\) into a finite direct sum of directly indecomposable algebras \(R_i\), the factors \(\Gamma(R_i)/A(R_i)\) are fields. Generalizing the result of \textit{D. J. Melville}
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Lie Algebras and Lie Algebra Representations

2017
In this chapter, we will introduce Lie algebras and Lie algebra representations, which provide a tractable linear construction that captures much of the behavior of Lie groups and Lie group representations.
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Finite Presentations of Lie Algebras And Restricted Lie Algebras

Bulletin of the London Mathematical Society, 1996
The author proves a version of the Golod-Shafarevich theorem for a large class of Lie algebras, including all finite-dimensional and all soluble Lie algebras. Specifically, suppose that \(L\) is a finite-dimensional or soluble Lie algebra over a field \(k\) which has a presentation with \(n\) generators and \(r\) relations.
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