Commutative $n$-ary superalgebras with an invariant skew-symmetric form

Abstract

We study $n$-ary commutative superalgebras and $L_{\infty }$-algebras that possess a skew-symmetric invariant form, using the derived bracket formalism. This class of superalgebras includes for instance Lie algebras and their $n$-ary generalizations, commutative associative and Jordan algebras with an invariant form. We give a classification of anti-commutative $m$-dimensional $(m-3)$-ary algebras with an invariant form, and a classification of real simple $m$-dimensional Lie $(m-3)$-algebras with a positive definite invariant form up to isometry. Furthermore, we develop the Hodge Theory for $L_{\infty }$-algebras with a symmetric invariant form, and we describe quasi-Frobenius structures on skew-symmetric $n$-ary algebras.

27 pages

References in corpus (2)

• n-ary algebras: a review with applications
• A supergeometric approach to Poisson reduction