New posts in separation-axioms

Metrizability of a compact Hausdorff space whose diagonal is a zero set

general-topology metric-spaces compactness separation-axioms

Examples of a quotient map not closed and quotient space not Hausdorff

general-topology examples-counterexamples quotient-spaces separation-axioms

Proof that every metric space is normal

general-topology metric-spaces separation-axioms

Why study non-T1 topological spaces?

general-topology soft-question separation-axioms

Cheap proof that the Sorgenfrey line is normal?

general-topology separation-axioms sorgenfrey-line

Give an example of a non compact Hausdorff space such that $\Delta$ is closed but $Y$ is not Hausdorff

general-topology compactness examples-counterexamples separation-axioms

Example of Hausdorff space $X$ s.t. $C_b(X)$ does not separate points?

real-analysis general-topology examples-counterexamples separation-axioms

Why is paracompactness needed to prove a regular space is normal?

general-topology proof-explanation separation-axioms paracompactness

A strong Hausdorff condition

general-topology examples-counterexamples separation-axioms

Every locally Compact Hausdorff Space is Regular.

general-topology solution-verification separation-axioms compactification

Is a metric space perfectly normal?

general-topology metric-spaces separation-axioms

Why are these two definitions of a perfectly normal space equivalent?

general-topology reference-request separation-axioms

Every minimal Hausdorff space is H-closed

general-topology examples-counterexamples separation-axioms

Prove that $Y$ is Hausdorff iff $X$ is Hausdorff and $A$ is a closed subset of $X$

general-topology quotient-spaces separation-axioms

Compactness and Strictly Finer Topologies.

general-topology compactness separation-axioms

Help understanding proof of every topological group is regular

proof-verification topological-groups separation-axioms

Is Arens Square a Urysohn space?

general-topology separation-axioms

If two continuous maps into a Hausdorff space agree on a dense subset, they are identically equal [duplicate]

general-topology continuity separation-axioms

Is every linear ordered set normal in its order topology?

general-topology order-theory separation-axioms order-topology

What application is there for a non-Hausdorff topological space?

general-topology intuition separation-axioms