Coadjoint orbits of low dimension for nilradicals of Borel subalgebras in classical types

Mikhail Ignatev, Alexey Petukhov

Let $\mathfrak{g}$ be a classical simple Lie algebra over an algebraically closed field $\mathbb{F}$ of characteristic zero or large enough, and let $\mathfrak{n}$ be a maximal nilpot…