M. Ignatev

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20232026

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math.RT2026

Orbits of submaximal dimension for Sylow $p$ -subgroups of finite classical orthogonal groups

Mikhail Ignatev, Mikhail Venchakov

Let $U$ be a Sylow $p$ -subgroup in a classical orthogonal group over a finite field with $q$ elements of characteristic $p$ large enough. The coadjoint orbits of the group $U$ play…

math.RT2026

Orbits of maximal and submaximal dimension for Sylow $p$ -subgroups of finite classical groups

Mikhail Ignatev, Mikhail Venchakov

Let $U$ be a Sylow $p$ -subgroup in a classical group over a finite field with $q$ elements of characteristic $p$ large enough. The coadjoint orbits of the group $U$ play the key ro…

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…

Orbits of submaximal dimension for Sylow p-subgroups of finite classical orthogonal groups

Orbits of maximal and submaximal dimension for Sylow p-subgroups of finite classical groups

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

Orbits of submaximal dimension for Sylow $p$ -subgroups of finite classical orthogonal groups

Orbits of maximal and submaximal dimension for Sylow $p$ -subgroups of finite classical groups