A note on the chromatic number of Kneser graphs on chambers of projective planes and incidence-free sets

Philipp Heering, Klaus Metsch, Vladislav Taranchuk +1

Let $D=(\mathcal{P},\mathcal{B})$ be a symmetric $(v,k,\lambda )$-design and let $(X,Y)$ be an equinumerous incidence-free pair, with $X\subseteq \mathcal{P}$ and $Y\subseteq \mathcal{B}$…