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After recalling the construction of a graded Lie bracket on the space of cyclic multilinear forms on a vector space V, due to Georges Pinczon and Rosane Ushirobira, we prove this construction gives a structure of quadratic associative…

Quantum Algebra · Mathematics 2012-11-13 Didier Arnal

Let $H$ be a real algebraic group acting equivariantly with finitely many orbits on a real algebraic manifold $X$ and a real algebraic bundle $\mathcal{E}$ on $X$. Let $\mathfrak{h}$ be the Lie algebra of $H$. Let…

Representation Theory · Mathematics 2017-11-29 Avraham Aizenbud , Dmitry Gourevitch , Bernhard Krötz , Gang Liu

We develop a calculus of variations for functionals on certain spaces of conformal maps. Such a space \Omega\ is composed of all maps that are conformal on domains containing a fix compact annular set of the Riemann sphere, and that are…

Mathematical Physics · Physics 2011-10-10 Benjamin Doyon

We find that a compatible graded left-symmetric algebra structure on the Witt algebra induces an indecomposable module of the Witt algebra with 1-dimensional weight spaces by its left multiplication operators. From the classification of…

Quantum Algebra · Mathematics 2020-11-18 Xiaoli Kong , Hongjia Chen , Chengming Bai

Let $\mathfrak{g}$ be a finite-dimensional complex Lie algebra and $\textrm{HLie}_{m}(\mathfrak{g})$ be the affine variety of all multiplicative Hom-Lie algebras on $\mathfrak{g}$. We use a method of computational ideal theory to describe…

Rings and Algebras · Mathematics 2024-03-01 Yin Chen , Runxuan Zhang

This paper presents an in-depth mathematical investigation into the intersection of two advanced Lie algebraic structures: the extended Schr\"odinger-Virasoro Lie algebra (ESVLA) and the Symplectic Novikov Lie algebra (SNLA). By rigorously…

Mathematical Physics · Physics 2024-08-14 Soumadeep Maiti

In this paper, we study representations of non-finitely graded Lie algebras $\mathcal{W}(\epsilon)$ related to Virasoro algebra, where $\epsilon = \pm 1$. Precisely speaking, we completely classify the free $\mathcal{U}(\mathfrak…

Representation Theory · Mathematics 2024-06-04 Chunguang Xia , Tianyu Ma , Xiao Dong , Mingjing Zhang

A Hom-algebra structure is a multiplication on a vector space where the structure is twisted by a homomorphism. The structure of Hom-Lie algebra was introduced by Hartwig, Larsson and Silvestrov and extended by Larsson and Silvestrov to…

Rings and Algebras · Mathematics 2007-06-13 A. Makhlouf , S. Silvestrov

We discuss the category $\cal I$ of level zero integrable representations of loop algebras and their generalizations. The category is not semisimple and so one is interested in its homological properties. We begin by looking at some…

Representation Theory · Mathematics 2010-09-08 Vyjayanthi Chari

The purpose of this article is to analyze several Lie algebras associated to "orbit configuration spaces" obtained from a group G acting freely, and properly discontinuously on the upper 1/2-plane H^2. The Lie algebra obtained from the…

Algebraic Topology · Mathematics 2007-05-23 Frederick R. Cohen , Toshitake Kohno , Miguel A. Xicotencatl

Let $\mathfrak{g}$ be a simply laced Lie algebra, $\widehat{\mathfrak{g}}_1$ the corresponding affine Lie algebra at level one, and $\mathcal{W}(\mathfrak{g})$ the corresponding Casimir W-algebra. We consider…

Mathematical Physics · Physics 2018-11-28 Raphaël Belliard , Bertrand Eynard , Sylvain Ribault

A compatible $L_\infty$-algebra is a graded vector space together with two compatible $L_\infty$-algebra structures on it. Given a graded vector space, we construct a graded Lie algebra whose Maurer-Cartan elements are precisely compatible…

Rings and Algebras · Mathematics 2021-11-29 Apurba Das

We determine the level two Zhu algebra for the Heisenberg vertex operator algebra $V$ for any choice of conformal element. We do this using only the following information for $V$: the internal structure of $V$; the level one Zhu algebra of…

Quantum Algebra · Mathematics 2023-03-21 Darlayne Addabbo , Katrina Barron

For a Hopf algebra B, we endow the Heisenberg double H(B^*) with the structure of a module algebra over the Drinfeld double D(B). Based on this property, we propose that H(B^*) is to be the counterpart of the algebra of fields on the…

Quantum Algebra · Mathematics 2010-05-12 AM Semikhatov

Based on any chiral vertex operator algebra satisfying a suitable finiteness condition, the semisimplicity of the zero-mode algebra as well as a regularity for induced modules, we construct conformal field theory over the projective line…

Quantum Algebra · Mathematics 2007-05-23 Kiyokazu Nagatomo , Akihiro Tsuchiya

We introduce a $C^*$-algebra $\mathscr{A}_V$ of a variety $V$ over the number field $K$ and a $C^*$-algebra $\mathscr{A}_G$ of a reductive group $G$ over the ring of adeles of $K$. Using Pimsner's Theorem we construct an embedding…

Number Theory · Mathematics 2021-04-07 Igor Nikolaev

This thesis contains results relevant for two different classes of conformal field theory. We partly treat rational conformal field theory, but also derive results that aim at a better understanding of logarithmic conformal field theory.…

High Energy Physics - Theory · Physics 2012-10-26 Carl Stigner

Monoidal product, braiding, balancing and weak duality are pieces of algebraic information that are well-known to have their origin in oriented genus zero surfaces and their mapping classes. More precisely, each of them correspond to…

Quantum Algebra · Mathematics 2025-09-09 Lukas Woike

Conformal algebra is an axiomatic description of the operator product expansion (or rather its Fourier transform) of chiral fields in a conformal field theory. This is a review of recent developments in the subject.

q-alg · Mathematics 2008-02-03 Victor G. Kac

The graded Hecke algebra for a finite Weyl group is intimately related to the geometry of the Springer correspondence. A construction of Drinfeld produces an analogue of a graded Hecke algebra for any finite subgroup of GL(V). This paper…

Group Theory · Mathematics 2007-05-23 Arun Ram , Anne V. Shepler