An Enumeration of Graphical Designs

Yeow Meng Chee, Petteri Kaski

Let $\Psi (t,k)$ denote the set of pairs $(v,\lambda )$ for which there exists a graphical $t$-$(v,k,\lambda )$ design. Most results on graphical designs have gone to show the finiteness of $\Psi (t,k)$…