Geodesic
Two cardinal inequalities for functionally Hausdorff spaces
Commentationes Mathematicae Universitatis Carolinae, Tome 35 (1994) no. 2, pp. 365-369.

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In this paper, two cardinal inequalities for functionally Hausdorff spaces are established. A bound on the cardinality of the $\tau \theta $-closed hull of a subset of a functionally Hausdorff space is given. Moreover, the following theorem is proved: if $X$ is a functionally Hausdorff space, then $|X|\leq 2^{\chi (X)\text{\it wcd}(X)}$.
Classification : 54A25, 54D10, 54D20
Keywords: cardinal functions; $\tau \theta $-closed sets; $w$-compactness degree 
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     author = {Fedeli, Alessandro},
     title = {Two cardinal inequalities for functionally {Hausdorff} spaces},
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Fedeli, Alessandro. Two cardinal inequalities for functionally Hausdorff spaces. Commentationes Mathematicae Universitatis Carolinae, Tome 35 (1994) no. 2, pp. 365-369. http://geodesic.mathdoc.fr/item/CMUC_1994__35_2_a17/