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  1. Additivity properties of topological diagonalizations.Tomek Bartoszynski, Saharon Shelah & Boaz Tsaban - 2003 - Journal of Symbolic Logic 68 (4):1254-1260.
    We answer a question of Just, Miller, Scheepers and Szeptycki whether certain diagonalization properties for sequences of open covers are provably closed under taking finite or countable unions.
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  • On some questions about selective separability.Liljana Babinkostova - 2009 - Mathematical Logic Quarterly 55 (5):539-541.
    CH implies that selective separability is not preserved by finite powers . In ZFC, selective separability does not imply H-separability.
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