An Unexpected Cyclic Symmetry of sl_{n+}^\eps
January 20, 2020
3:55 AM
Abstract. We introduce $sl_{n+}^\eps$, a one-parameter family of Lie algebras that encodes an approximation of the semi-simple Lie algebra $sl_n$ by solvable algebras (this is useful elsewhere; see []). We find that $sl_{n+1}^\eps$ has an unanticipated order $n$ automorphism $\Psi$. Why is it there?