On automorphisms of certain free nilpotent-by-abelian Lie algebras

C. E. Kofinas, A. I. Papistas

For a positive integer $n$, with $n\ge 4$, let $R_n$ be a free (nilpotent of class 2)-by-abelian and abelian-by-(nilpotent of class 2) Lie algebra of rank $n$. We show that the…