Supplements to maximal subalgebras of Lie algebras

Details Supplements to maximal subalgebras of Lie algebras Supplements to maximal subalgebras of Lie algebras

2010-07-28

arxiv.org/abs/1007.4902v1

Mathematics

Rings and Algebras

Scientific paper

For a Lie algebra $L$ and a subalgebra $M$ of $L$ we say that a subalgebra $U$ of $L$ is a {\em supplement} to $M$ in $L$ if $L = M + U$. We investigate those Lie algebras all of whose maximal subalgebras have abelian supplements, those that have nilpotent supplements, those that have nil supplements, and those that have supplements with the property that their derived algebra is inside the maximal subalgebra being supplemented. For the algebras over an algebraically closed field of characteristic zero in the last three of these classes we find complete descriptions; for those in the first class partial results are obtained.

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