P-ideal dichotomy and a strong form of the Suslin Hypothesis

FUNDAMENTA MATHEMATICAE(2020)

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摘要
We introduce a forcing notion which forces the P-ideal dichotomy, while every almost Suslin tree from the ground model remains non-special. Thus, while the P-ideal dichotomy implies the Suslin Hypothesis, or equivalently that every Aronszajn tree has an uncountable antichain, it does not imply that every Aronszajn tree has a stationary antichain.
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关键词
P-ideal dichotomy,special Aronszajn tree,almost Suslin tree
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