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arXiv · 2409.09697

Adding Abraham clubs and $α$-properness

Mohammad Golshani·Rouholah Hoseini Naveh
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Abstract

For every indecomposable ordinal $α< ω_1$, we introduce a variant of Abraham forcing for adding a club in $ω_1$, which is $<α$-proper but not $α$-proper.

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Mohammad Golshani, Rouholah Hoseini Naveh. 2024-09-15. Adding Abraham clubs and $α$-properness. https://arxiv.org/abs/2409.09697

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