T2 (Hausdorff)
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Every compact subspace of a Hausdorff space is closed. That is, if \(Y\) is a compact subspace of a \(T_2\) space \(X\), then \(Y\) is a closed subset of \(X\).
(VUT) A continuous bijection from a compact space to a Hausdorff space is a homeomorphism.
Compact Hausdorff spaces are \(T_4\).
\(T_2\) is not preserved by quotients, continuous images, or continuous preimages.
Let \(X\) be a \(T_2\) topological space and let \(p \in X\). Then \(\{p\}\) is closed in \(X\).