Search Results - "Wagemann, Friedrich"
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Enhanced Leibniz Algebras: Structure Theorem and Induced Lie 2-Algebra
Published in Communications in mathematical physics (01-05-2020)“…An enhanced Leibniz algebra is an algebraic struture that arises in the context of particular higher gauge theories describing self-interacting gerbes. It…”
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Cohomology of Leibniz Algebras
Published in Jahresbericht der Deutschen Mathematiker-Vereinigung (01-12-2023)“…This is a survey on new developments in the cohomology of Leibniz algebras for the Deutsche Mathematiker Vereinigung. We will mainly report on results with…”
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A cocycle model for topological and Lie group cohomology
Published in Transactions of the American Mathematical Society (01-03-2015)“…We propose a unified framework in which the different constructions of cohomology groups for topological and Lie groups can all be treated on an equal footing…”
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Lie rackoids integrating Courant algebroids
Published in Annals of global analysis and geometry (01-03-2020)“…We construct an infinite-dimensional Lie rackoid Y which hosts an integration of the standard Courant algebroid. As a set, Y = C ∞ ( [ 0 , 1 ] , T ∗ M ) for a…”
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Sympathetic Lie algebras and adjoint cohomology for Lie algebras
Published in Journal of algebra (01-09-2023)“…We study sympathetic (i.e., perfect and complete) Lie algebras. Among other topics they arise in the study of adjoint Lie algebra cohomology. Here a motivation…”
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Ext groups in the category of bimodules over a simple Leibniz algebra
Published in Journal of pure and applied algebra (01-06-2021)“…In this article, we generalize Loday and Pirashvili's [11] computation of the Ext-category of Leibniz bimodules for a simple Lie algebra to the case of a…”
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Deformation quantization of Leibniz algebras
Published in Advances in mathematics (New York. 1965) (22-01-2015)“…In this paper, we use the local integration of a Leibniz algebra h using a Baker–Campbell–Hausdorff type formula in order to deformation quantize its linear…”
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On Leibniz cohomology
Published in Journal of algebra (01-03-2021)“…In this paper we prove the Leibniz analogue of Whitehead's vanishing theorem for the Chevalley-Eilenberg cohomology of Lie algebras. As a consequence, we…”
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On the cohomology of solvable Leibniz algebras
Published in Indagationes mathematicae (01-01-2024)Get full text
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ON 2-HOLONOMY
Published in Journal of the Australian Mathematical Society (2001) (01-04-2021)“…We construct a cycle in higher Hochschild homology associated to the two-dimensional torus which represents 2-holonomy of a nonabelian gerbe in the same way as…”
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Representations of Crossed Modules and Other Generalized Yetter-Drinfel’d Modules
Published in Applied categorical structures (01-08-2017)“…The Yang-Baxter equation plays a fundamental role in various areas of mathematics. Its solutions, called braidings, are built, among others, from…”
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Lie rackoids
Published in Annals of global analysis and geometry (01-09-2016)“…We define a new differential geometric structure, called Lie rackoid. A Lie rackoid differentiates to Leibniz algebroids in a similar way as Lie groupoids…”
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Algebraic deformation quantization of Leibniz algebras
Published in Communications in algebra (02-12-2018)“…In this paper we focus on a certain self-distributive multiplication on coalgebras, which leads to so-called rack bialgebra. We construct canonical rack…”
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More remarks on the cohomology of Krichever–Novikov algebras
Published in Afrika mathematica (01-04-2012)“…This article is a continuation of previous work on the cohomology of Krichever–Novikov algebras (Wagemann in Lett Math Phys 47:173–177, 1999 ). We extend here…”
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Cohomology of perfect Lie algebras
Published 22-11-2024“…We study the adjoint cohomology of perfect Lie algebras over the complex numbers. For the family of perfect Lie algebras $\mathfrak{g}=\mathfrak{sl}_2(\Bbb…”
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Tensor products of Leibniz bimodules and Grothendieck rings
Published 01-11-2024“…In this paper we define three different notions of tensor products for Leibniz bimodules. The ``natural" tensor product of Leibniz bimodules is not always a…”
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On the String Lie Algebra
Published in Algebras and representation theory (01-08-2015)“…We construct an abelian representative for the crossed module associated to the string Lie algebra. We show how to apply this construction in order to define…”
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Deformations of Lie algebras of vector fields arising from families of schemes
Published in Journal of geometry and physics (01-02-2008)“…Fialowski and Schlichenmaier constructed global deformations of the infinitesimally and formally rigid Lie algebra of polynomial vector fields on the circle…”
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On Lie Algebra Crossed Modules
Published in Communications in algebra (01-01-2006)“…The goal of this article is to construct a crossed module representing the cocycle ⟨[,],⟩ generating H 3 ( ;ℂ) for a simple complex Lie algebra …”
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Associative algebra deformations of Connes–Moscovici's Hopf algebra H 1
Published in Journal of algebra (01-04-2010)“…We compute the second Hochschild cohomology space HH 2 ( H 1 ) of Connes–Moscovici's Hopf algebra H 1 , giving the infinitesimal deformations (up to…”
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