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arXiv 1306.6225math-phmath.CTmath.MPmath.RT
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Lie 2-代数的变形

Deformations of Lie 2-algebras

Zhangju Liu, Yunhe Sheng, Tao Zhang

摘要:

本文利用上同调理论研究了Lie 2-代数的变形。我们证明了Lie 2-代数$\g$的1-参数无穷小变形对应于$\g$的2-上循环,其系数在伴随表示中。引入李2-代数的Nijenhuis算子来描述平凡变形.从半直积李2-代数变形的角度研究了李2-代数的交换扩张。

英文摘要:

In this paper, we consider deformations of Lie 2-algebras via the cohomology theory. We prove that a 1-parameter infinitesimal deformation of a Lie 2-algebra $\g$ corresponds to a 2-cocycle of $\g$ with the coefficients in the adjoint representation. The Nijenhuis operator for Lie 2-algebras is introduced to describe trivial deformations. We also study abelian extensions of Lie 2-algebras from the viewpoint of deformations of semidirect product Lie 2-algebras.

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