# Category:Hausdorff Spaces

This category contains results about $T_2$ (Hausdorff) spaces.
$\struct {S, \tau}$ is a Hausdorff space or $T_2$ space if and only if:
$\forall x, y \in S, x \ne y: \exists U, V \in \tau: x \in U, y \in V: U \cap V = \O$
for any two distinct elements $x, y \in S$ there exist disjoint open sets $U, V \in \tau$ containing $x$ and $y$ respectively.