A SIMPLE CONSTRUCTION OF KIRKMAN TRIPLE SYSTEMS OF ORDER 3h


Antonio Causa, Leonardo Fragapane, Mario Gionfriddo§, Elena Guardo

Abstract: A Steiner triple system (STS) of order v is a 3-uniform hypergraph with v vertices in which every 2-subset of vertices has degree 1. A Kirkman triple system (KTS) is a resolvable Steiner triple system, that is, a partition of the blocks of the triple system into classes which are themselves partitions of the set of vertices into disjoint blocks. In this paper we give a construction of KTS of order v = 3h much simpler and less technical than previously known constructions.

Keywords: Kirkman triple systems, resolvable designs.

MSC: 05B07, 05B10.

DOI       10.56082/annalsarscimath.2026.2.225

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causa@dmi.unict.it, Dipartimento di Matematica e Informatica, University of Catania, Viale A. Doria, 6- 95100- Catania, Italy
leonardo.fragapane@phd.unict.it, Dipartimento di Matematica e Informatica, University of Catania, Viale A. Doria, 6- 95100- Catania, Italy
§
gionfriddo@dmi.unict.it, Dipartimento di Matematica e Informatica, University of Catania, Viale A. Doria, 6- 95100- Catania, Italy
guardo@dmi.unict.it, Dipartimento di Matematica e Informatica, University of Catania, Viale A. Doria, 6- 95100- Catania, Italy

PUBLISHED in

Annals Academy of Romanian Scientists Series on Mathematics and Its Application,

Volume 18 no 2, 2026

       

ISSN ONLINE 2066 – 6594
ISSN PRINT 2066 – 5997