T. Pazák

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Let B, C be Boolean algebras and e : B → C an embedding. We examine the hierarchy of ideals on C for which e : B → C/I is a regular (i.e. complete) embedding. As an application we deal with the interrelationship between P(ω)/fin in the ground model and in its extension. If M is an extension of V containing a new subset of ω, then in M there is an almost(More)
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