Flag-transitive $2$-$(v,k,\lambda )$ designs with $\lambda \ge (r,\lambda {)}^2$

Junchi Zhang, Jianbing Lu, Meizi Ou

This paper is devoted to the study of $2$-designs with $\lambda \ge (r,\lambda {)}^2$ admitting a flag-transitive automorphism group $G$. The group $G$ has been shown to be point-primitive of eith…