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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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2022_06_24_kra_moreira_richter_robertson: Theorem 1.2 of Kra, Moreira, Richter and Robertson (Commun. Amer. Math. Soc. 2024) gives, in every set of positive upper Banach density, an infinite B and a shift t with every sum of two distinct members of B plus t in the set.