Question

Perfect sets: squaring rudin's definition of "limit point" with that of another book's.

score 169 · Answer 1 · 2026-04-10 23:44:54

169

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Perfect sets: squaring rudin's definition of "limit point" with that of another book's.

Published on 10 Apr 2026 - 23:44

score 275 · Answer 2 · 2026-04-15 03:43:24

275

Views

$\mathbb{Q}$ is not a $G_{\delta}$ What is wrong with my argument?

Published on 15 Apr 2026 - 3:43

score 85 · Answer 3 · 2026-04-11 21:40:37

85

Views

Is the distinguish topology finer than the usual topology?

Published on 11 Apr 2026 - 21:40

score 110 · Answer 4 · 2026-04-13 17:01:22

110

Views

Is $\tau=\{\mathbb{R},\emptyset$ and every interval $(-n,n)\}$ a $T_1$ -space

Published on 13 Apr 2026 - 17:01

score 59 · Answer 5 · 2026-04-12 03:25:20

59

Views

Reference for (Generalised) Adjunction spaces

Published on 12 Apr 2026 - 3:25

score 690 · Answer 6 · 2026-04-16 00:35:34

690

Views

Prove that every $T_1$-space is $T_0$-space

Published on 16 Apr 2026 - 0:35

score 76 · Answer 7 · 2026-04-12 11:08:36

76

Views

Clarifying the Defintion of Locally Connected

Published on 12 Apr 2026 - 11:08

score 179 · Answer 8 · 2026-04-14 07:33:57

179

Views

A confusion regarding Closed graph theorem

Published on 14 Apr 2026 - 7:33

score 147 · Answer 9 · 2026-04-15 18:29:11

147

Views

$(X,\tau)$ will be a $T_0$-space but not a $T_1$-space

Published on 15 Apr 2026 - 18:29

score 78 · Answer 10 · 2026-04-22 16:22:25

78

Views

Uncountable product of many copies of $\mathbb{Z}$ is not paracompact

Published on 22 Apr 2026 - 16:22

score 7.6k · Answer 11 · 2026-04-08 18:05:30

7.6k

Views

Rational numbers are not locally compact

Published on 08 Apr 2026 - 18:05

score 308 · Answer 12 · 2026-04-15 16:44:53

308

Views

Lemma 27.5 in Munkres (Lebesgue number)

Published on 15 Apr 2026 - 16:44

score 387 · Answer 13 · 2026-04-09 04:49:34

387

Views

Forming manifolds from intersecting lines in Euclidean space

Published on 09 Apr 2026 - 4:49

score 58 · Answer 14 · 2026-04-10 22:58:05

58

Views

Is the set of all $(u,v) \in \mathbb{R}^2$ where $0\le u \le 1$ and $-\infty<v<\infty$ open or closed?

Published on 10 Apr 2026 - 22:58

score 123 · Answer 15 · 2026-04-08 01:28:48

123

Views

Can a semialgebraic function be continuously extended to the closure of its domain?

Published on 08 Apr 2026 - 1:28

List Question

Perfect sets: squaring rudin's definition of "limit point" with that of another book's.

$\mathbb{Q}$ is not a $G_{\delta}$ What is wrong with my argument?

Is the distinguish topology finer than the usual topology?

Is $\tau=\{\mathbb{R},\emptyset$ and every interval $(-n,n)\}$ a $T_1$ -space

Reference for (Generalised) Adjunction spaces

Prove that every $T_1$-space is $T_0$-space

Clarifying the Defintion of Locally Connected

A confusion regarding Closed graph theorem

$(X,\tau)$ will be a $T_0$-space but not a $T_1$-space

Uncountable product of many copies of $\mathbb{Z}$ is not paracompact

Rational numbers are not locally compact

Lemma 27.5 in Munkres (Lebesgue number)

Forming manifolds from intersecting lines in Euclidean space

Is the set of all $(u,v) \in \mathbb{R}^2$ where $0\le u \le 1$ and $-\infty<v<\infty$ open or closed?

Can a semialgebraic function be continuously extended to the closure of its domain?

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