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Research notes on every problem, and a library of the papers behind them. Built from the open erdos repository.

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1965_03_01_erdos_hajnal_rado: Corollary 7 of Erdős, Hajnal and Rado (Acta Math. Acad. Sci. Hungar., 1965) gives, under GCH, the negative relation of Problem 1168. GCH is consistent with ZFC, so ZFC, if consistent, does not refute the relation.