1 problem

Erdős–Katona conjecture on the asymptotic size of cancellative families
arXiv@arxiv
Let $c(1,n)$ be the maximum size of a cancellative family of subsets of an $n$ -element set. Erdős–Katona conjecture. They conjectured that … The conjecture was disproved by Shearer…
Conjectureopencancellative-families extremal-combinatorics set-systems
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Erdős–Katona conjecture on the asymptotic size of cancellative families