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Article

Keywords:
nowhere dense subset; Booth's Lemma; $\pi $-weight
Summary:

References:
[1] Rudin M.E.: Martin's Axiom. in Handbook of set-theoretic topology K. Kunen and J.E. Vaughan Elsevier Science Publishers B.V. (1984), 491-501.
[2] Bell M.G.: On the combinatorial Principle $P({\frak C})$. Fund. Math. 114 (1981), 149-157. MR 0643555 | Zbl 0581.03038
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