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arXiv 0904.3010math.RAmath.RT
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初等李代数和李A-代数的进一步结果

Further results on elementary Lie algebras and Lie A-algebras

David A. Towers, Vicente R. Varea

摘要:

特征为零的域$F$上的有限维李代数$L$称为初等的,如果它的每个子代数都有平凡的Frattini理想;它是$A$ -代数,如果每个幂零子代数都是阿贝尔的。本文是作者在“Elementary Lie Algebras and Lie A-algebras”,J. Algebra 312(2007),891- 901中对这些代数的研究的继续。若分别用$\mathcal{A}$,$\mathcal{G}$,$\mathcal{E}$,$\mathcal{L}$,$Φ$表示$A$ -代数,几乎代数代数,$E$ -代数,初等代数和$ϕ$ - free代数类,则有:\mathcal{L},\subset Φ,\mathcal{G},\mathcal{L},\mathcal{E}和\mathcal{G} = \mathcal{A}.它还表明,如果$L$是一个半单李代数,其所有的极小抛物子代数是$ϕ$ -免费的,那么$L$是一个$A$ -代数,因此小学。这需要抛物子代数的一些相当微妙的性质。最后给出了$E$ -代数和其真子代数都是初等的李代数的特征。

英文摘要:

A finite-dimensional Lie algebra $L$ over a field $F$ of characteristic zero is called elementary if each of its subalgebras has trivial Frattini ideal; it is an $A$-algebra if every nilpotent subalgebra is abelian. This paper is a continuation of the study of these algebras initiated by the authors in `Elementary Lie Algebras and Lie A-algebras', J. Algebra 312 (2007), 891--901. If we denote by $\mathcal{A}$, $\mathcal{G}$, $\mathcal{E}$, $\mathcal{L}$, $Φ$ the classes of $A$-algebras, almost algebraic algebras, $E$-algebras, elementary algebras and $ϕ$-free algebras respectively, then it is shown that: \mathcal{L} \subset Φ\subset \mathcal{G}, \mathcal{L} \subset \mathcal{A} \subset \mathcal{E} and \mathcal{G} \cap \mathcal{A} = \mathcal{L}. It is also shown that if $L$ is a semisimple Lie algebra all of whose minimal parabolic subalgebras are $ϕ$-free then $L$ is an $A$-algebra, and hence elementary. This requires a number of quite delicate properties of parabolic subalgebras. Finally characterisations are given of $E$-algebras and of Lie algebras all of whose proper subalgebras are elementary.

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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