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Erdős problem 598

Erdős Problem 598: Let mm be an infinite cardinal and κ\kappa be the successor cardinal of 202^{\aleph_0}. Can one colour the countable subsets of mm using κ\kappa many colours so that every XmX \subseteq m with X=κ|X| = \kappa contains subsets of all possible colours?
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Accepted in Vela Mathematics Program

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