Delta-1-2 Without Sharps
classification
🧮 math.LO
keywords
delta-1-2realsaleph-1aleph-2assumingboldfacecessibleconsistency
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We show that the supremum of the lengths of boldface Delta-1-2 prewellorderings of the reals can be Aleph-2, with Aleph-1 inac- cessible to reals, assuming only the consistency of an inaccessible.
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