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arXiv math/9912190math.RTmath.SG
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Omni-李代数

Omni-Lie Algebras

Alan Weinstein

摘要:

证明了具有某种反对称括号运算的空间R^n x gl(n,R)包含所有n维李代数.括号不满足雅可比恒等式,但它满足它的子代数是迷向的在一定的对称双线性型下的值在R^n。我们问对应的“类组”对象应该是什么。括号可以通过在一点处线性化由T引入的TM + T*M上的括号来获得。柯朗为狄拉克结构的定义,一个概念,其中包括泊松结构,封闭的2-形式,和叶理。

英文摘要:

We show that the space R^n x gl(n,R) with a certain antisymmetric bracket operation contains all n-dimensional Lie algebras. The bracket does not satisfy the Jacobi identity, but it does satisfy it for subalgebras which are isotropic under a certain symmetric bilinear form with values in R^n. We ask what the corresponding "group-like" object should be. The bracket may be obtained by linearizing at a point the bracket on TM + T*M introduced by T. Courant for the definition of Dirac structures, a notion which encompasses Poisson structures, closed 2-forms, and foliations.

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