Abstract
The Kalikow problem for a pair (λ, κ) of cardinal numbers, λ > κ (in particular κ = 2) is whether we can map the family of ω-sequences from λ to the family of ω-sequences from κ in a very continuous manner. Namely, we demand that for η, ν ∈ ω λ we have: η, ν are almost equal if and only if their images are. We show consistency of the negative answer, e.g., for אω but we prove it for smaller cardinals. We indicate a close connection with the free subset property and its variants.
| Original language | English |
|---|---|
| Pages (from-to) | 137-151 |
| Number of pages | 15 |
| Journal | Fundamenta Mathematicae |
| Volume | 166 |
| Issue number | 1-2 |
| State | Published - 2001 |
Keywords
- Continuity
- Forcing
- Free subset
- Kalikow
- Set theory