List questions from general-topology

Published on 05 May 2018 - 2:28

287

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if a topology $\tau$ is finer than the usual topology $\tau_0$ on $\mathbb{R}$ then ($\mathbb{R}$,$\tau$ ) is Hausdorff

Published on 05 May 2018 - 3:10

51

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On nowhere dense sets

Published on 05 May 2018 - 8:11

2.4k

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Proof of Topologist Sine curve is not path connected .

Published on 25 Mar 2026 - 7:51

540

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Regular Topology

Published on 05 May 2018 - 12:29

84

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Do derived sets have anything similar to derivatives?

Published on 25 Mar 2026 - 6:05

171

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Finding all subgroups of $\mathbb{Z}^2$ using algebraic topology.

Published on 25 Mar 2026 - 9:36

532

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French limits are different !

Published on 05 May 2018 - 22:13

2.7k

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Is a discrete metric space totally bounded?

Published on 05 May 2018 - 23:02

169

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Equivalent definitions for subbasis

Published on 05 May 2018 - 23:13

195

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Proving that $\mathbb{P}^{n}(\mathbb{C})$ is homeomorphic to $S^{2n+1}/S^{1}$

Published on 04 Apr 2026 - 16:12

360

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The disjoint union of covering spaces is again a covering space

Published on 25 Mar 2026 - 9:39

1.3k

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Proper direct image and extension by zero

Published on 25 Mar 2026 - 11:09

87

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Minimum conditions for $f(x_n) \to f(x)$ to imply $x_n \to x$?

Published on 06 May 2018 - 5:41

76

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Let $\tau=\{\mathbb{Q,I,R},\emptyset\}$. Discuss the convergence or divergence of $\{\frac{1}{n}\}_n$ in this topology.

Published on 06 May 2018 - 6:34

List Question

A query in the proof of no retraction theorem

if a topology $\tau$ is finer than the usual topology $\tau_0$ on $\mathbb{R}$ then ($\mathbb{R}$,$\tau$ ) is Hausdorff

On nowhere dense sets

Proof of Topologist Sine curve is not path connected .

Regular Topology

Do derived sets have anything similar to derivatives?

Finding all subgroups of $\mathbb{Z}^2$ using algebraic topology.

French limits are different !

Is a discrete metric space totally bounded?

Equivalent definitions for subbasis

Proving that $\mathbb{P}^{n}(\mathbb{C})$ is homeomorphic to $S^{2n+1}/S^{1}$

The disjoint union of covering spaces is again a covering space

Proper direct image and extension by zero

Minimum conditions for $f(x_n) \to f(x)$ to imply $x_n \to x$?

Let $\tau=\{\mathbb{Q,I,R},\emptyset\}$. Discuss the convergence or divergence of $\{\frac{1}{n}\}_n$ in this topology.

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