The argument shift method in universal enveloping algebra $U{\mathfrak{gl}}_d$

Abstract

We prove the conjecture that allows one extend the argument shifting procedure from symmetric algebra $S{\mathfrak{gl}}_d$ of the Lie algebra ${\mathfrak{gl}}_d$ to the universal enveloping algebra $U{\mathfrak{gl}}_d$. Namely, it turns out that the iterated quasi-derivations of the central elements in $U{\mathfrak{gl}}_d$ commute with each other. Here quasi-derivation is a linear operator on $U{\mathfrak{gl}}_d$, constructed by Gurevich, Pyatov and Saponov. This allows one better understand the structure of \textit{argument shift algebras} (or \textit{Mishchenko-Fomenko algebras}) in the universal enveloping algebra of ${\mathfrak{gl}}_d$.

13 pages, first draft