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arxiv: math/9712288 · v1 · pith:WQ76DSFEnew · submitted 1997-12-15 · 🧮 math.LO

The covering numbers of Mycielski ideals are all equal

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keywords coveringidealsnumbersequalmycielskiomegawillaleph
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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.

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