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arXiv 0705.2332math.RA
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经典李代数的极值表示

Extremal Presentations for Classical Lie Algebras

Jos in 't panhuis, Erik Postma, Dan Roozemond

摘要:

Chevalley型李代数中的长根元已得到很好的研究,并可刻画为极值元,即$x$元,使得$(\ad x)^2$的象位于$x$张成的子空间中.本文在特征不为2的代数闭基域的条件下,利用极值生成元的极小集给出了经典Chevalley型李代数的表示.这些关系用集合上的单图来描述。例如,对于$C_n$,图是长度为$2n$的路径,而对于$A_n$,图是连接到长度为$n-3$的路径的三角形。

英文摘要:

The long-root elements in Lie algebras of Chevalley type have been well studied and can be characterized as extremal elements, that is, elements $x$ such that the image of $(\ad x)^2$ lies in the subspace spanned by $x$. In this paper, assuming an algebraically closed base field of characteristic not 2, we find presentations of the Lie algebras of classical Chevalley type by means of minimal sets of extremal generators. The relations are described by simple graphs on the sets. For example, for $C_n$ the graph is a path of length $2n$, and for $A_n$ the graph is the triangle connected to a path of length $n-3$.

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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