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arXiv 1802.04061math.RA
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Hom-李代数的交换扩张与交叉模

Abelian extensions and crossed modules of Hom-Lie algebras

José-Manuel Casas, Xabier García-Martínez

摘要:

本文研究了Hom-李代数的低维上同调群及其与导子、交换扩张和交叉模的关系。一方面,我们引入了$α$ -阿贝尔扩张的概念,得到了一个上同调的五项正合列。另一方面,我们引入了Hom-李代数的交叉模,证明了它们与猫$^1$ -Hom-李代数的等价性,并引入了$α$ -交叉模,以便更好地理解第三上同调群.

英文摘要:

In this paper we study the low dimensional cohomology groups of Hom-Lie algebras and their relation with derivations, abelian extensions and crossed modules. On one hand, we introduce the notion of $α$-abelian extensions and we obtain a five term exact sequence in cohomology. On the other hand, we introduce crossed modules of Hom-Lie algebras showing their equivalence with cat$^1$-Hom-Lie algebras, and we introduce $α$-crossed modules to have a better understanding of the third 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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