Abstract
We study the positions in the Weihrauch lattice of parallel products of various combinatorial principles related to Ramsey’s theorem. Among other results, we obtain an answer to a question of Brattka, by showing that Ramsey’s theorem for pairs (RT22) is Weihrauch-incomparable to the parallel produc t of the stable Ramsey’s theorem for pairs and the cohesive principle (SRT22×COH).
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