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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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1956_09_01_erdos_rado: Erdős and Rado prove that the order type of the real line arrows (4, alpha) on triples for every alpha below omega times 2, which settles Problem 70 for every beta below omega times 2 and n at most 4; refereed in Bull. AMS.