Category:Definitions/Closed Sets
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This category contains definitions related to Closed Sets in the context of Topology.
Related results can be found in Category:Closed Sets.
$H$ is closed (in $T$) if and only if its complement $S \setminus H$ is open in $T$.
That is, $H$ is closed if and only if $\paren {S \setminus H} \in \tau$.
That is, if and only if $S \setminus H$ is an element of the topology of $T$.
Pages in category "Definitions/Closed Sets"
The following 9 pages are in this category, out of 9 total.