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28 March 2024
 
  » arxiv » 1305.1350

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A 5-Engel associative algebra whose group of units is not 5-Engel
Galina Deryabina ; Alexei Krasilnikov ;
Date 7 May 2013
AbstractLet R be an associative ring with unity and let [R] and U(R) denote the associated Lie ring (with [a,b]=ab-ba) and the group of units of R, respectively. In 1983 Gupta and Levin proved that if [R] is a nilpotent Lie ring of class c then U(R) is a nilpotent group of class at most c. The aim of the present note is to show that, in general, a similar statement does not hold if [R] is n-Engel. We construct an algebra R over a field of characteristic different from 2 and 3 such that the Lie algebra [R] is 5-Engel but U(R) is not a 5-Engel group.
Source arXiv, 1305.1350
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