List questions from general-topology

Published on 03 Apr 2026 - 18:24

106

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Convexity and the partition of the unity

Published on 08 Apr 2026 - 17:22

894

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Inequivalence of Compactness and Sequential Compactness, Especially for the Weak* Topology?

Published on 29 Jun 2018 - 9:06

80

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Prove the completeness of the following metric space

Published on 01 Apr 2026 - 15:59

40

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Open sets in metric spaces as special unions.

Published on 01 Apr 2026 - 16:04

409

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Let $A \subset X$; A retraction of $X$ onto $A$ is a continuous

Published on 02 Apr 2026 - 9:54

184

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Question About Definition of a Topological Space

Published on 29 Jun 2018 - 16:36

252

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Constructing Kuratowski closure operator from (co)topology

Published on 29 Jun 2018 - 16:47

289

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Topological variations of the spherical shell

Published on 29 Jun 2018 - 20:32

1.6k

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why a closed set is not bounded even though it converges

Published on 01 Apr 2026 - 15:58

685

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If $X \times Y$ is Separable, are $X, Y$ Separable?

Published on 25 Mar 2026 - 11:22

361

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Are $\mathbb{R}[X] / (X^2 +1)$ and $\mathbb{C}$ homeomorphic?

Published on 25 Mar 2026 - 8:07

249

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Distinguishing Two Compactifications of $[0,1)$

Published on 04 Apr 2026 - 6:24

104

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Open or closed set?

Published on 25 Mar 2026 - 14:19

180

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Equivalence between the "topological" definition of dense set and the one given for subsets of $\mathbb{R}$

Published on 04 Apr 2026 - 19:58

List Question

The components are the transfinitely iterated stationary quasicomponents

Convexity and the partition of the unity

Inequivalence of Compactness and Sequential Compactness, Especially for the Weak* Topology?

Prove the completeness of the following metric space

Open sets in metric spaces as special unions.

Let $A \subset X$; A retraction of $X$ onto $A$ is a continuous

Question About Definition of a Topological Space

Constructing Kuratowski closure operator from (co)topology

Topological variations of the spherical shell

why a closed set is not bounded even though it converges

If $X \times Y$ is Separable, are $X, Y$ Separable?

Are $\mathbb{R}[X] / (X^2 +1)$ and $\mathbb{C}$ homeomorphic?

Distinguishing Two Compactifications of $[0,1)$

Open or closed set?

Equivalence between the "topological" definition of dense set and the one given for subsets of $\mathbb{R}$

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