ArticleOriginal scientific text

Title

A forcing construction of thin-tall Boolean algebras

Authors 1

Affiliations

  1. Facultat de Matemàtiques, Universitat de Barcelona, Gran Via 585, 08007 Barcelona, Spain

Abstract

It was proved by Juhász and Weiss that for every ordinal α with {0<α<ω2} there is a superatomic Boolean algebra of height α and width ω. We prove that if κ is an infinite cardinal such that κ<κ=κ and α is an ordinal such that 0<α<κ++, then there is a cardinal-preserving partial order that forces the existence of a superatomic Boolean algebra of height α and width κ. Furthermore, iterating this forcing through all α<κ++, we obtain a notion of forcing that preserves cardinals and such that in the corresponding generic extension there is a superatomic Boolean algebra of height α and width κ for every α<κ++. Consistency for specific κ, like ω1, then follows as a corollary.

Bibliography

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Pages:
99-113
Main language of publication
English
Received
1996-03-04
Accepted
1997-11-24
Published
1999
Exact and natural sciences