n-ary algebras: a review with applications

Abstract

This paper reviews the properties and applications of certain n-ary generalizations of Lie algebras in a self-contained and unified way. These generalizations are algebraic structures in which the two entries Lie bracket has been replaced by a bracket with n entries. Each type of n-ary bracket satisfies a specific characteristic identity which plays the rôle of the Jacobi identity for Lie algebras. Particular attention will be paid to generalized Lie algebras, which are defined by even multibrackets obtained by antisymmetrizing the associative products of its n components and that satisfy the generalized Jacobi identity (GJI), and to Filippov (or n-Lie) algebras, which are defined by fully antisymmetric n-brackets that satisfy the Filippov identity (FI). Three-Lie algebras have surfaced recently in multi-brane theory in the context of the Bagger-Lambert-Gustavsson model. Because of this, Filippov algebras will be discussed at length, including the cohomology complexes that govern their central extensions and their deformations (Whitehead's lemma extends to all semisimple n-Lie algebras). When the skewsymmetry of the n-Lie algebra is relaxed, one is led the n-Leibniz algebras. These will be discussed as well, since they underlie the cohomological properties of n-Lie algebras. The standard Poisson structure may also be extended to the n-ary case. We shall review here the even generalized Poisson structures, whose GJI reproduces the pattern of the generalized Lie algebras, and the Nambu-Poisson structures, which satisfy the FI and determine Filippov algebras. Finally, the recent work of Bagger-Lambert and Gustavsson on superconformal Chern-Simons theory will be briefly discussed. Emphasis will be made on the appearance of the 3-Lie algebra structure and on why the A_4 model may be formulated in terms of an ordinary Lie algebra, and on its Nambu bracket generalization.

Invited topical review for JPA Math.Theor. v2: minor changes, references added. 120 pages, 318 references

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Cited by in corpus (9)

• Representations and Cohomology of n-ary multiplicative Hom-Nambu-Lie algebras
• Constructing Self-Dual Strings
• A Hom-associative analogue of n-ary Hom-Nambu algebras
• Ternutator Identities
• The partially alternating ternary sum in an associative dialgebra
• M2-KK6 System in ABJM Theory : Fuzzy $S^3$ and Wrapped KK6
• Open M2-branes with Flux and Modified Basu-Harvey Equation
• Necessary conditions for Ternary Algebras
• Hidden quartic symmetry in N=2 supersymmetry