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李代数的极小形变的构造

Construction of Miniversal Deformations of Lie Algebras

Alice Fialowski, Dmitry Fuchs

摘要:

我们考虑特征为0的域上有限维或无限维李代数的变形。如果试图描述一个给定李代数的所有非等价变形,在文献中会有大量的混乱。已知的是,一般不存在具有以下性质的具有交换代数基A的李代数L的"通用"变形:对于具有基B的L的任何其他变形,存在唯一的同态f:A-> B,其引起等价变形。因此,人们被引导去寻求一种“微型”变形。对于一个极小的变形,这样的同态存在,但仅在第一级是唯一的。如果我们考虑基规范为A的变形,其中A是一个局部代数,那么在一些小的限制下,存在一个极小元。本文给出了一个极小变形的构造。

英文摘要:

We consider deformations of finite or infinite dimensional Lie algebras over a field of characteristic 0. There is substantial confusion in the literature if one tries to describe all the non-equivalent deformations of a given Lie algebra. It is known that there is in general no "universal" deformation of the Lie algebra L with a commutative algebra base A with the property that for any other deformation of L with base B there exists a unique homomorphism f: A -> B that induces an equivalent deformation. Thus one is led to seek a "miniversal" deformation. For a miniversal deformation such a homomorphism exists, but is unique only at the first level. If we consider deformations with base spec A, where A is a local algebra, then under some minor restrictions there exists a miniversal element. In this paper we give a construction of a miniversal deformation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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