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arXiv:2401.13446 [math.LO]AbstractReferencesReviewsResources

Slender Trees and the Approximation Property

Hannes Jakob

Published 2024-01-24Version 1

We obtain a relatively simple criterion for when a forcing has the ${<}\,\delta$-approximation property, generalizing a result of Unger. Afterwards we apply this criterion to construct variants of Mitchell Forcing in order to answer questions posed by Mohammadpour.

Comments: 28 pages, 0 figures
Categories: math.LO
Subjects: 03E05, 03E35, 03E55
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