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arXiv 0911.0243math.RT
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分幂(上)同调。单有限维模李超代数的Cartan矩阵表示

Divided power (co)homology. Presentations of simple finite dimensional modular Lie superalgebras with Cartan matrix

Sofiane Bouarroudj, Pavel Grozman, Alexei Lebedev, Dimitry Leites

摘要:

对于模李超代数,引入了除幂同调和除幂上同调的概念。为了说明,我们给介绍(在类似物的Chevalley发电机)的有限维李(超)代数与不可分解的Cartan矩阵的特征2(和其他特征的图片的完整性)。我们纠正了目前文献中Chevalley生成元和Cartan矩阵在模和超情况下的概念,以及Dynkin图的辅助概念。在特征2中,A,D,E型单经典李代数的定义关系不仅是Serre关系,而且对于具有相同Cartan矩阵和任意生成元奇偶分布的李超代数,这些非Serre关系也是相同的.给出了不含Cartan矩阵的单正交李代数的表示.

英文摘要:

For modular Lie superalgebras, new notions are introduced: Divided power homology and divided power cohomology. For illustration, we give presentations (in terms of analogs of Chevalley generators) of finite dimensional Lie (super)algebras with indecomposable Cartan matrix in characteristic 2 (and in other characteristics for completeness of the picture). We correct the currently available in the literature notions of Chevalley generators and Cartan matrix in the modular and super cases, and an auxiliary notion of the Dynkin diagram. In characteristic 2, the defining relations of simple classical Lie algebras of the A, D, E types are not only Serre ones; these non-Serre relations are same for Lie superalgebras with the same Cartan matrix and any distribution of parities of the generators. Presentations of simple orthogonal Lie algebras having no Cartan matrix are also given..

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