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arXiv 1102.4194math-phhep-thmath.MPmath.QAmath.RA
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n元代数专题

Topics on n-ary algebras

J. A. de Azcarraga, J. M. izquierdo

摘要:

本文描述了两个n元代数,广义李代数(GLAs)和Filippov(或n-Lie)代数(FAs)的基本性质,并对它们的n元Poisson对应结构,广义Poisson(GP)和Nambu-Poisson(N-P)结构作了评述.我们描述了Filippov代数上同调相关的中心扩展和无穷小变形的FA。可以看出,半单FA不承认中心的扩展,而且,他们是刚性的。这将熟悉的Whitehead引理扩展到所有$n\geq 2$ FA,n=2是标准的李代数情况。当n-括号的FA不再需要是完全反对称的一个是导致的n-莱布尼茨(或Loday的)代数结构。利用FAs是n-Leibniz代数的一个特例,即具有反交换n-括号的FAs,我们研究了简单FAs的n-Leibniz变形类,这些简单FAs保持了n-Leibniz括号的前n-1个整数的斜对称性.

英文摘要:

We describe the basic properties of two n-ary algebras, the Generalized Lie Algebras (GLAs) and, particularly, the Filippov (or n-Lie) algebras (FAs), and comment on their n-ary Poisson counterparts, the Generalized Poisson (GP) and Nambu-Poisson (N-P) structures. We describe the Filippov algebra cohomology relevant for the central extensions and infinitesimal deformations of FAs. It is seen that semisimple FAs do not admit central extensions and, moreover, that they are rigid. This extends the familiar Whitehead's lemma to all $n\geq 2$ FAs, n=2 being the standard Lie algebra case. When the n-bracket of the FAs is no longer required to be fully skewsymmetric one is led to the n-Leibniz (or Loday's) algebra structure. Using that FAs are a particular case of n-Leibniz algebras, those with an anticommutative n-bracket, we study the class of n-Leibniz deformations of simple FAs that retain the skewsymmetry for the first n-1 entires of the n-Leibniz bracket.

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