Support Sizes of Triple Systems with Small Index

C. J. Colbourn1, S. Milici2
1Department of Combinatorics and Optimization University of Waterloo Waterloo, Ontario N2L 3G1 CANADA
2Dipartimento di Matematica Viale A. Doria 6 95125 Catania ITALY

Abstract

For each integer \(v \geq 0\) and each \(\lambda \in \{4, 5, 7, 8\}\), the possible numbers of distinct blocks in a triple system of order \(v\) and index \(\lambda\) is determined. This essentially completes the determination of possible support sizes for triple systems with \(\lambda \leq 8\).