Bounded Martin's Maximum with Many Witnesses

Details Bounded Martin's Maximum with Many Witnesses Bounded Martin's Maximum with Many Witnesses

2008-12-07

arxiv.org/abs/0812.1330v1

Mathematics

Logic

Scientific paper

We study a strengthening of Bounded Martin's Maximum which asserts that if a \Sigma_1 fact holds of \omega_2^V in a stationary set preserving extension then it holds in V for a stationary set of ordinals less than \omega_2. We show that this principle implies Global Projective Determinacy, and therefore does not hold in the \mathbb{P}_{max} model for \mathsf{BMM}, but that the restriction of this principle to forcings which render \omega_2^V countably cofinal does hold in the \mathsf{BMM} model, though it is not a consequence of \mathsf{BMM}.

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