An Unexpected Cyclic Symmetry of $I{\mathfrak{u}}_n$

Dror Bar-Natan, Roland van der Veen

We find and discuss an unexpected (to us) order $n$ cyclic group of automorphisms of the Lie algebra $I{\mathfrak{u}}_n:={\mathfrak{u}}_n⋉{\mathfrak{u}}_n^{\ast }$, where $\mathfrak…