Journal of Algebra ( IF 0.9 ) Pub Date : 2021-06-15 , DOI: 10.1016/j.jalgebra.2021.06.001 D.H. Kochloukova , C. Martínez-Pérez
We develop a version of Bass-Serre theory for Lie algebras (over a field k) via a homological approach. We define the notion of fundamental Lie algebra of a graph of Lie algebras and show that this construction yields Mayer-Vietoris sequences. We extend some well known results in group theory to -graded Lie algebras: for example, we show that one relator -graded Lie algebras are iterated HNN extensions with free bases which can be used for cohomology computations and apply the Mayer-Vietoris sequence to give some results about coherence of Lie algebras.
中文翻译:
李代数的 Bass-Serre 理论:一种同调方法
我们通过同调方法为李代数(在域k 上)开发了一个版本的 Bass-Serre 理论。我们定义了李代数图的基本李代数的概念,并表明这种构造产生了 Mayer-Vietoris 序列。我们将群论中的一些众所周知的结果扩展到-分级李代数:例如,我们证明一个关系 分级李代数是带有自由碱基的迭代 HNN 扩展,可用于上同调计算并应用 Mayer-Vietoris 序列来给出一些关于李代数相干性的结果。