Mathematics – Logic
Scientific paper
1997-12-15
Mathematics
Logic
Scientific paper
The Mycielski ideal M_k is defined to consist of all sets A subseteq k^omega
such that {f restriction X: f in A} not= k^X for all X in [omega]^{aleph_0}.
It will be shown that the covering numbers for these ideals are all equal.
However, the covering numbers of the closely associated Roslanowski ideals
will be shown to be consistently different.
Shelah Saharon
Steprāns Juris
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