Overlap Cycles for Steiner Quadruple Systems

Details Overlap Cycles for Steiner Quadruple Systems Overlap Cycles for Steiner Quadruple Systems

2012-04-14

arxiv.org/abs/1204.3215v1

Mathematics

Combinatorics

24 pages

Scientific paper

Steiner quadruple systems are set systems in which every triple is contained in a unique quadruple. It is will known that Steiner quadruple systems of order v, or SQS(v), exist if and only if v = 2, 4 mod 6. Universal cycles, introduced by Chung, Diaconis, and Graham in 1992, are a type of cyclic Gray code. Overlap cycles are generalizations of universal cycles that were introduced in 2010 by Godbole. Using Hanani's SQS constructions, we show that for every v = 2, 4 mod 6 with v > 4 there exists an SQS(v) that admits a 1-overlap cycle.

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