M. Ignatev

collaborators

3 papers

math.RT2026

On the number of irreducible representations for finite unipotent Heisenberg-type groups

Mikhail Ignatev, Leonid Titov

Let $U$ be an algebraic subgroup of the group of $n \times n$ upper-triangular matrices with units on the diagonal over a finite field of large enough characteristic, and $\mathfrak…

math.RT2025

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

Mikhail Ignatev, Alexey Petukhov

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

math.RT2025

Orbits and characters associated with rook placements for Sylow $p$ -subgroups of finite orthogonal groups

Mikhail Ignatev, Mikhail Venchakov

Let $U$ be a Sylow $p$ -subgroup in a classical group over a finite field of characteristic $p$ . The coadjoint orbits of the group $U$ play the key role in the description of irredu…

On the number of irreducible representations for finite unipotent Heisenberg-type groups

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

Orbits and characters associated with rook placements for Sylow p-subgroups of finite orthogonal groups

Orbits and characters associated with rook placements for Sylow $p$ -subgroups of finite orthogonal groups