J. Porter

activity

20122018

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

1 citations · 1 across the 8 of their papers we have counts for

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math.GN2016

On the cardinality of Hausdorff spaces and H-closed spaces

Nathan Carlson, Jack Porter

We introduce the cardinal invariant $a L^{'} (X)$ and show that $∣ X ∣ \leq 2^{a L^{'} (X) χ (X)}$ for any Hausdorff space $X$ (a corollary of Theorem 4.4. This invariant has the prop…