Xiaoqin Zhan

collaborators

2 papers

math.GR2025

On primitivity and reduction for half-flag-transitive block designs

Xiaoqin Zhan

Let $D = (P, B)$ be a $2$ - $(v, k, λ)$ design, and let $G$ be a half-flag-transitive automorphism group of $D$ . In this article, we first establ…

math.GR2025

Block-Transitive Automorphism Groups of $2$ - $(v, 5, λ)$ Designs

Chuhan Lei, Xiaoqin Zhan

This paper investigates $2$ - $(v, 5, λ)$ designs $D$ admitting a block-transitive automorphism group $G$ . We first prove that if $G$ is point-imprimitive, then $v$ must be o…

On primitivity and reduction for half-flag-transitive block designs

Block-Transitive Automorphism Groups of 2-(v,5,λ) Designs

Block-Transitive Automorphism Groups of $2$ - $(v, 5, λ)$ Designs