On transversal and 2-packing numbers in uniform linear systems^☆

Figures & data

Fig. 1 Linear system ${\mathcal{C}}_{3,4}=(P_3,{\mathcal{L}}_3)$.

Fig. 2 (a) Projective plane of order 3, ${\Pi }_3$ and (b) Linear system obtained from ${\Pi }_3$ by deleting the lines of the triangle $\mathcal{T}$.