Article ID Journal Published Year Pages File Type
6424780 Annals of Pure and Applied Logic 2013 8 Pages PDF
Abstract

We extend the work of Fischer et al. (2011) [6] by presenting a method for controlling cardinal characteristics in the presence of a projective wellorder and 2ℵ0>ℵ2. This also answers a question of Harrington (1977) [9] by showing that the existence of a Δ31 wellorder of the reals is consistent with Martinʼs axiom and 2ℵ0=ℵ3.

Related Topics
Physical Sciences and Engineering Mathematics Logic
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