Zero divisors in enveloping algebras of graded Lie algebras
Zero divisors in enveloping algebras of graded Lie algebras
复制标题
分级李代数的包络代数中的零因数
DOI:
10.1016/0022-4049(85)90006-4
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发表时间:
1985
影响因子:
0.8
通讯作者:
J. Lemaire
中科院分区:
文献类型:
--
作者:
M. Aubry;J. Lemaire
Let L be a graded Lie algebra over a field k of characteristic different from 2. If L is concentrated in even degrees, that is, if L is a Lie algebra in the ordinary sense, its enveloping algebra UL has no zero divisors: this is an easy consequence of the PoincarC-Birkhoff-Witt theorem. On the other hand, if L contains a nonzero element of odd degree x such that [x, x]= 0, clearly UL has zero divisors. Following R. Bprgvad [3], let us say that a graded Lie algebra is ‘torsion-free’if [x, x]# 0 for every non-zero x of odd degree, and ‘absolutely torsion-free’if it remains torsion-free after field extension to the algebraic closure L of k. Then our main result states: