Article contents
Adjoining cofinitary permutations
Published online by Cambridge University Press: 12 March 2014
Abstract
We show that it is consistent with ZFC + ¬CH that there is a maximal cofinitary group (or, maximal almost disjoint group) G ≤ Sym(ω) such that G is a proper subset of an almost disjoint family A ⊆ Sym(ω) and ‖G‖ < ‖A‖. We also ask several questions in this area.
- Type
- Research Article
- Information
- Copyright
- Copyright © Association for Symbolic Logic 1999
References
REFERENCES
- 4
- Cited by