Resolvable-derived-STS conjecture for SQS(n), n congruent to 4 modulo 6
Resolvable-derived-STS conjecture for SQS(n), n congruent to 4 modulo 6
Let an SQS be a Steiner quadruple system on points, and let a derived STS be the Steiner triple system obtained by fixing a point of the SQS and deleting that point from every block containing it. A Steiner triple system is resolvable when its blocks can be partitioned into parallel classes.
Resolvable-derived-STS conjecture. If
then there is an SQS such that all its derived STS are resolvable.
This conjecture is used to obtain . The source reports it as known for , for several families admitting 2-resolvable SQSs, and for sufficiently large with , but not in general.
Progress summary
Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.
Sources & referencesView supporting material
Primary source
Minjia Shi, Yuhong Xia and Denis S. Krotov, “A family of diameter perfect constant-weight codes from Steiner systems”, arXiv:2212.00048 (2023).
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