On the Centralizer of $K$ in $U(\mathfrak{g})$

Bertram Kostant

Let $\mathfrak{g}=\mathfrak{k}+\mathfrak{p}$ be a complexified Cartan decomposition of a complex semisimple Lie algebra $\mathfrak{g}$ and let $K$ be the subgroup of the adjoint group of $\frak…