Thin Leibniz algebras (Q881089)

A Leibniz algebra \(L\) is said to be \textit{thin} if \(\dim(L^1/L^2)=2\) and \(\dim(L_i/L_{i+1})=1\) for all \(i\geq 2\). Here \(L^1=L\) and \(L^{n+1}=[L^n,L]\). The author proves that there are three classes of non-Lie thin Leibniz algebras.