A complete classification of the $(15_{4}20_3)$-configurations with at least three $K_5$-graphs

K. Petelczyc, M. Prażmowska, K. Prażmowski

The class of $\left({\left(\genfrac{}{}{0ex}{}{n+1}{2}\right)}_{n-1}{\left(\genfrac{}{}{0ex}{}{n+1}{3}\right)}_3\right)$-configurations which contain at least $n-2$ $K_n$-graphs coincides with the class of so called systems of triangle…