The left side of Cicho\'n's diagram
classification
🧮 math.LO
keywords
mathcalmathrmmathfrakalephcichoconstructdiagramfinite
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Using a finite support iteration of ccc forcings, we construct a model of $\aleph_1<\mathrm{add}(\mathcal{N})<\mathrm{cov}(\mathcal{N})<\mathfrak{b}<\mathrm{non}(\mathcal{M})<\mathrm{cov}(\mathcal{M})=\mathfrak{c}$.
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