Disjoint base-block conjecture for cyclic -designs
Disjoint base-block conjecture for cyclic -designs
Let be a cyclic -design: the blocks are partitioned into orbits under a cyclic automorphism, and a base block is one chosen block from each orbit. Disjoint base-block conjecture. For every cyclic -design, one can choose one block from each block orbit so that all chosen blocks are pairwise disjoint. This extends the Steiner triple system case to arbitrary block size and allows short orbits; the paper proves the assertion when is prime, but leaves the general case conjectural.
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Sources & referencesView supporting material
Primary source
Tao Feng, Daniel Horsley and Xiaomiao Wang, “Novák's conjecture on cyclic Steiner triple systems and its generalization”, arXiv:2001.06995 (2021).
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