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20122018
most citedAbsolutes of Hausdorff spaces and cardinal invariants $F_{\te}$ and $t_{\te}$}

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math.GN2015

Cardinality bounds involving the skew- Lindelöf degree and its variants

Nathan Carlson, Jack Porter

We introduce a modified closing-off argument that results in several improved bounds for the cardinalities of Hausdorff and Urysohn spaces. These bounds involve the cardinal invari…