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arXiv 2003.03899math.RAmath-phmath.MPmath.RT
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任意权微分代数的上同调、扩张和变形

Cohomologies, extensions and deformations of differential algebras with any weights

Li Guo, Yunnan Li, Yunhe Sheng, Guodong Zhou

摘要:

微分代数作为微分方程的代数研究,已经有一个世纪的历史,并成为数学的一个重要领域。近年来,该领域已扩大到非交换结合和李代数的情况下,当运营商身份有一个权重,以包括差分算子和差代数。本文给出了任意权的微分代数的上同调理论。这给出了一个统一的方法,零重量的情况下,这是类似于早期的研究微分李代数,和非零重量的情况下,提出了新的挑战。作为应用,利用二阶上同调群对微分代数的阿贝尔扩张进行了分类。进一步得到了微分代数的形式变形,并通过二阶上同调群的消失刻画了微分代数的刚性.

英文摘要:

As an algebraic study of differential equations, differential algebras have been studied for a century and and become an important area of mathematics. In recent years the area has been expended to the noncommutative associative and Lie algebra contexts and to the case when the operator identity has a weight in order to include difference operators and difference algebras. This paper provides a cohomology theory for differential algebras of any weights. This gives a uniform approach to both the zero weight case which is similar to the earlier study of differential Lie algebras, and the non-zero weight case which poses new challenges. As applications, abelian extensions of a differential algebra are classified by the second cohomology group. Furthermore, formal deformations of differential algebras are obtained and the rigidity of a differential algebra is characterized by the vanishing of the second cohomology group.

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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