Topic: T0, T1 and Hausdorff Spaces

Nets and the Unique-Limit Characterization of Hausdorffness

Neighborhood Separation and the T0-T1-T2 Definitions

Hausdorffness Passes to Subspaces

Hausdorff Spaces and Disjoint Neighborhoods

First Countability and Sequence-Based Hausdorff Tests

Coordinatewise Separation Calculations in Product Examples

Continuous Images Need Not Preserve Hausdorffness

Common Errors in Checking T0, T1, and Hausdorffness

Cofinite Topologies: T1 Without Hausdorffness

Classifying Separation Axioms in Familiar Spaces