514 citations
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Showing 1999Show all
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math.LO1999★ 1 cited
On the weak Freese-Nation property of complete Boolean algebras
Sakaé Fuchino, Stefan Geschke, Saharon Shelah +1
The following results are proved: (a) In a model obtained by adding aleph_2 Cohen reals, there is always a c.c.c. complete Boolean algebra without the weak Freese-Nation property.…
math.LO1999
On absolutely divergent series
Sakae Fuchino, Heike Mildenberger, Saharon Shelah +1
We show that in the aleph_2-stage countable support iteration of Mathias forcing over a model of CH the complete Boolean algebra generated by absolutely divergent series under even…