How to show given space is not simply connected?
57274
Asphericity of pseudo circle
42811
Product of path connected spaces is path connected
10209
How to show the spacetime interval is invariant in general?
66895
A condition for the image of a metrizable space to be metrizable
52014
Showing $(C[0,1], d_1)$ is not a complete metric space
4717
The union of linear subspaces is not necessarily a subspace
35682
How to add blank space in proof environment without changing the position of the word "proof"?
78300
Showing a set is closed other than giving a counterexample?
10034
Give an example of a non-separable subspace of a separable space
3762
Why are the endpoint lines of intervals (`|-|`) not shown completely?
16060
Showing this metric space is complete
50645
Is the following set (path) connected?
68153
How to show that $L^p$ spaces are nested?
42714
A diagram which is not the torus
48557
Product of connected spaces
56281
Is there a \show for lengths?
101712
Let $X$ be obtained by removing finitely many lines from $\mathbb{R}^3$. How do I prove $X$ is connected?