Extremal-family conjecture for non-star intersecting s-stable families
Extremal-family conjecture for non-star intersecting s-stable families
Let , let be the family of -stable -subsets of , and let be a family in this set. An intersecting family is one whose members pairwise intersect; it is a non-star family if it is not contained in a family of all sets containing a fixed element. Let denote its covering number. For and with , define
and let be the collection of all such families.
Extremal-family conjecture. If is a non-star intersecting family with , then, for large enough—suggested in the source as —
This is an extremal set-theoretic conjecture intended to identify the largest non-star intersecting families of -stable sets. The source gives only a suggested threshold and does not provide a resolution.
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
Wei-Chia Chen, Alex Parker and Shira Zerbib, “The chromatic number of 3-stable Kneser graphs”, arXiv:2607.12912 (2026).
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