Hausdorff space

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Hausdorff space (or T2 spaces) is a topological space in which, for any pair of distinct points x and y, there exist disjoint open sets U and V, such that x is in U and y is in V. Almost all spaces studied in analysis are Hausdorff.

The subspace of a Hausdorff space is a Hausdorff space; the product of 2 Hausdorff spaces is a Hausdorff space.

The most important property of Hausdorff spaces is that sequences, nets and filters converge to a unique point.

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