Hechler's theorem for the meager ideal
classification
🧮 math.LO
keywords
forcinghechleridealmeagertheoremtherebasisbound
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We prove the following theorem: For a partially ordered set Q such that every countable subset has a strict upper bound, there is a forcing notion satisfying ccc such that, in the forcing model, there is a basis of the meager ideal of the real line which is order-isomorphic to Q with respect to set-inclusion. This is a variation of Hechler's classical result in the theory of forcing.
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