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Was Sierpinski right? IV

Saharon Shelah

math.LOarXiv:math/9712282

Abstract

We prove for any mu = mu< mu< theta < lambda, lambda large enough (just strongly inaccessible Mahlo) the consistency of 2mu = lambda-> [theta]23 and even 2mu = lambda-> [theta]2sigma,2 for sigma < mu . The new point is that possibly theta > mu+ .

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