New posts in Quotient Spaces

The topology on $X/{\sim}\times X/{\sim}$ is not induced by $\pi\times\pi$.

Example of quotient mapping that is not open

Showing $\mathbb{R}/\mathbb{Q}$ is not Hausdorff

How to prove $D^n/S^{n-1}\cong S^n$?

When is the product of two quotient maps a quotient map?

The $n$-disk $D^n$ quotiented by its boundary $S^{n-1}$ gives $S^n$