Generalized symmetric systems and thin-very tall compact scattered spaces

preprint2015arXivOpen access

Abstract

We solve a well--known problem in the theory of compact scattered spaces and superatomic boolean algebras by showing that, under GCH and for each regular cardinal κ≥ωκ\geq ω, there is a poset Pκ\mathcal P_κ preserving all cardinals and forcing the existence of a κκ--thin very tall locally compact scattered space. For κ>ωκ> ω, we conceive the poset Pκ\mathcal P_κ as a higher analogue of the poset Pω\mathcal P_ω originally introduced by Asperó and Bagaria in the context of an (unpublished) alternative consistency proof.

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