Talagrand's bounded-uniformity fractional expectation threshold conjecture
Let be a finite set, let satisfy , and let . Define by
\left<g\right>:=\left\{S\in 2^X\mathrel{\left|}\sum_{T\subseteq S}g(T)\geq 1\right.\right\},and for a family define , with defined analogously. The bounded-uniformity conjecture. There exists a fixed such that, for all finite sets , all such , all such functions , and all , if , then there exists a set such that and
This is a restricted form of Talagrand's conjecture whose resolution would imply the full conjecture. Results cited in the source cover constant-size support, and current quantitative bounds do not establish this claim in general.
References
Primary source
Thomas Fischer and Yury Person, “Further remarks on fractional vs. expectation thresholds”, arXiv:2505.21782 (2025).
Additional references
3 papers in this index state this conjecture (2021–2025). The statement above is taken from the most recent of them; the others are arXiv:2311.08163, arXiv:2105.10905.
Progress summary
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