Yu Zeng

collaborators

3 papers

math.GR2025

On $p$ -parts of conjugacy class sizes and the index of the $p$ -core

Yu Zeng, Jinbao Li, Yong Yang

For a prime $p$ and an arbitrary finite group $G$ , we show that if $p^{2}$ does not divide the size of each conjugacy class of \emph{ $p$ -regular} element (element of order not divi…

math.GR2025

Finite groups of non-prime-power order with exactly four character codegrees

Yu Zeng, Mehdi Ghaffarzadeh, Mohsen Ghasemi +1

For an irreducible complex character $χ$ of a finite group $G$, the \emph{codegree} of $χ$ is defined as the ratio $|G : \ker(χ)| / χ(1)$, where $\ker(χ)$ represents the…

math.GR2025

Finite groups with exactly two nonlinear irreducible $p$ -Brauer characters

Fuming Jiang, Yu Zeng

Let $p$ be a prime. We classify the finite groups having exactly two irreducible $p$ -Brauer characters of degree larger than one. The case, where the finite groups have orders not…

On p-parts of conjugacy class sizes and the index of the p-core

Finite groups of non-prime-power order with exactly four character codegrees

Finite groups with exactly two nonlinear irreducible p-Brauer characters

On $p$ -parts of conjugacy class sizes and the index of the $p$ -core

Finite groups with exactly two nonlinear irreducible $p$ -Brauer characters