514 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- National Astronomical Observatory of JapanJP49 papers
- The University of TokyoJP48 papers
- The Graduate University for Advanced Studies, SOKENDAIJP33 papers
- Kavli Institute for the Physics and Mathematics of the UniverseJP26 papers
- Hokkaido UniversityJP21 papers
- Nagoya UniversityJP21 papers
- The University of OsakaJP20 papers
- Institute for Cosmic Ray ResearchJP17 papers
- Waseda UniversityJP17 papers
- Ehime UniversityJP16 papers
- University of TsukubaJP16 papers
- University College LondonGB15 papers
4 papers · 1 filter
Hechler's theorem for the null ideal
Maxim R. Burke, Masaru Kada
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…
Hechler's theorem for the meager ideal
Tomek Bartoszynski, Masaru Kada
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…
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.…
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…