On resolvable Steiner 2-designs and maximal arcs in projective planes

摘要

A combinatorial characterization of resolvable Steiner 2-$(v,k,1)$ designsembeddable as maximal arcs in a projective plane of order $(v-k)/(k-1)$ isproved, and a generalization of a conjecture by Andries Brouwer \cite{Br} isformulated.