Question

difficulty in understanding the symbols?

score 117 · Answer 1 · 2026-04-13 08:46:35

117

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difficulty in understanding the symbols?

Published on 13 Apr 2026 - 8:46

score 379 · Answer 2 · 2026-04-11 09:19:05

379

Views

In which cases, there is no continuous map from A onto B?

Published on 11 Apr 2026 - 9:19

score 279 · Answer 3 · 2026-04-12 10:39:26

279

Views

Intuitively speaking why use geodesics to capture the idea of completeness?

Published on 12 Apr 2026 - 10:39

score 125 · Answer 4 · 2026-04-18 07:24:33

125

Views

Is $\mathbb R$ with usual euclidean topology, homeomorphic with some topological field of positive characteristic?

Published on 18 Apr 2026 - 7:24

score 60 · Answer 5 · 2026-04-09 17:05:25

60

Views

Looking for an example of a continuous function such that the inverse image is not a Heyting Algebras morphism

Published on 09 Apr 2026 - 17:05

score 101 · Answer 6 · 2026-04-15 23:11:25

101

Views

How to show that if $U$ is an open set in a product topology then $\pi_{i}(U)=E_i$ for all but finitely many indices $I.$

Published on 15 Apr 2026 - 23:11

score 392 · Answer 7 · 2026-04-17 08:25:59

392

Views

The Metric in $\mathbb{R}/\mathbb{Z}$

Published on 17 Apr 2026 - 8:25

score 82 · Answer 8 · 2026-04-13 02:10:48

82

Views

Equivalent definition of closure

Published on 13 Apr 2026 - 2:10

score 1.1k · Answer 9 · 2026-04-15 01:31:57

1.1k

Views

Cofinite topology on infinite sets can't be induced from a metric space.

Published on 15 Apr 2026 - 1:31

score 575 · Answer 10 · 2026-04-14 11:39:20

575

Views

Discrete subgroup of topological group

Published on 14 Apr 2026 - 11:39

score 150 · Answer 11 · 2026-04-11 22:09:24

150

Views

How to find the dense subsets of a topological space

Published on 11 Apr 2026 - 22:09

score 36 · Answer 12 · 2026-04-14 11:34:42

Showing that all sets in $\mathcal{B}:=\{a+b\mathbb{Z}:a\in \mathbb{Z}, b\in \mathbb{N}\}$ are closed wrt the topology $\mathcal B$ is the basis of

score 175 · Answer 13 · 2026-04-10 20:09:55

175

Views

If $A\subset K$ and $K$ compact, does $\bar A$ compact?

Published on 10 Apr 2026 - 20:09

score 253 · Answer 14 · 2026-04-06 08:59:56

253

Views

Convenient categories in algebraic topology: their importance, and the role topology plays in their construction

Published on 06 Apr 2026 - 8:59

score 81 · Answer 15 · 2026-04-14 05:43:27

81

Views

When $E$ has finite dimension, then the weak topology and the strong topologie are the same.

Published on 14 Apr 2026 - 5:43

List Question

difficulty in understanding the symbols?

In which cases, there is no continuous map from A onto B?

Intuitively speaking why use geodesics to capture the idea of completeness?

Is $\mathbb R$ with usual euclidean topology, homeomorphic with some topological field of positive characteristic?

Looking for an example of a continuous function such that the inverse image is not a Heyting Algebras morphism

How to show that if $U$ is an open set in a product topology then $\pi_{i}(U)=E_i$ for all but finitely many indices $I.$

The Metric in $\mathbb{R}/\mathbb{Z}$

Equivalent definition of closure

Cofinite topology on infinite sets can't be induced from a metric space.

Discrete subgroup of topological group

How to find the dense subsets of a topological space

Showing that all sets in $\mathcal{B}:=\{a+b\mathbb{Z}:a\in \mathbb{Z}, b\in \mathbb{N}\}$ are closed wrt the topology $\mathcal B$ is the basis of

If $A\subset K$ and $K$ compact, does $\bar A$ compact?

Convenient categories in algebraic topology: their importance, and the role topology plays in their construction

When $E$ has finite dimension, then the weak topology and the strong topologie are the same.

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