A Doubling Construction for Overlarge Sets of Steiner Triple Systems

Martin J. Sharry1, Anne Penfold Street1
1 Centre for Combinatorics, Department of Mathematics The University of Queensland, Queensland 4072, AUSTRALIA

Abstract

Given an overlarge set of Steiner triple systems, each on \(v\) points, we construct an overlarge set of Steiner triple systems, each on \(2v+1\) points. Overlarge sets with specified properties can be constructed in this way; in particular, we construct overlarge sets which cannot be derived from Steiner quadruple systems.