arXiv subjects

D. Burde

Publications and source records attributed to D. Burde.

3 recordsLinked to original sources

arXiv2021

The structure of Lie algebras with a derivation satisfying a polynomial identity

We prove nilpotency results for Lie algebras over an arbitrary field admitting a derivation, which satisfies a given polynomial identity $r(t)=0$. For the polynomial $r=t^n-1$ we obtain results on the nilpotency of Lie algebras admitting a periodic derivation of order $n$. We find an optimal bound on the nilpotency class in characteristic $p$ if $p$ does not divide a certain invariant $ρ_n$. We give a new description of the set $\mathcal{N}_p$ of positive integers $n$, introduced by Shalev, which arise as the order of a periodic derivation of a finite-dimensional non-nilpotent Lie algebra in characteristic $p>0$. Finally we generalize the results to Lie rings over $\Bbb Z$.

math.RA↗

arXiv2017

Commutative post-Lie algebra structures and linear equations for nilpotent Lie algebras

We show that for a given nilpotent Lie algebra $\mathfrak{g}$ with $Z(\mathfrak{g})\subseteq [\mathfrak{g},\mathfrak{g}]$ all commutative post-Lie algebra structures, or CPA-structures, on $\mathfrak{g}$ are complete. This means that all left and all right multiplication operators in the algebra are nilpotent. Then we study CPA-structures on free-nilpotent Lie algebras $F_{g,c}$ and discover a strong relationship to solving systems of linear equations of type $[x,u]+[y,v]=0$ for generator pairs $x,y\in F_{g,c}$. We use results of Remeslennikov and Stöhr concerning these equations to prove that, for certain $g$ and $c$, the free-nilpotent Lie algebra $F_{g,c}$ has only central CPA-structures.

math.RA↗

arXiv2011

Periodic derivations and prederivations of Lie algebras

We consider finite-dimensional complex Lie algebras admitting a periodic derivation, i.e., a nonsingular derivation which has finite multiplicative order. We show that such Lie algebras are at most two-step nilpotent and give several characterizations, such as the existence of gradings by sixth roots of unity, or the existence of a nonsingular derivation whose inverse is again a derivation. We also obtain results on the existence of periodic prederivations. In this context we study a generalization of Engel-4-Lie algebras.

math.RA↗