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  1. No Tukey Reduction of Lebesgue Null to Silver Null Sets.Otmar Spinas - 2018 - Journal of Mathematical Logic 18 (2):1850011.
    We prove that consistently the Lebesgue null ideal is not Tukey reducible to the Silver null ideal. This contrasts with the situation for the meager ideal which, by a recent result of the author, Spinas [Silver trees and Cohen reals, Israel J. Math. 211 473–480] is Tukey reducible to the Silver ideal.
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