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 |
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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