Semistationary and stationary reflection
نویسنده
چکیده
We study the relationship between the semistationary reflection principle and stationary reflection principles. We show that for all regular cardinals λ ≥ ω2 the semistationary reflection principle in the space [λ] implies that every stationary subset of E ω := {α ∈ λ | cf(α) = ω} reflects. We also show that for all cardinals λ ≥ ω3 the semistationary reflection principle in [λ] does not imply the stationary reflection principle in [λ].
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عنوان ژورنال:
- J. Symb. Log.
دوره 73 شماره
صفحات -
تاریخ انتشار 2008