Abstract
AbstractLet 𝔉 be a saturated formation of soluble Leibniz algebras. LetKbe an 𝔉-projector andA/Ba chief factor of the soluble Leibniz algebraL. It is well known that ifA/Bis 𝔉-central, thenKcoversA/B. I prove the converse: ifKcoversA/B, thenA/Bis 𝔉-central.
Publisher
Cambridge University Press (CUP)