On flag-transitive automorphism groups of symmetric designs

Seyed Hassan Alavi, Ashraf Daneshkhah, Narges Okhovat

In this article, we study flag-transitive automorphism groups of non-trivial symmetric $(v,k,\lambda )$ designs, where $\lambda$ divides $k$ and $k\ge {\lambda }^2$. We show that such an automorphism…