Question

step in proof Spivak about partition of unity

score 169 · Answer 1 · 2026-03-25 04:25:15

169

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step in proof Spivak about partition of unity

Published on 25 Mar 2026 - 4:25

score 90 · Answer 2 · 2026-03-17 23:24:45

90

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Spivak proof partition of unity: case 2 (countable compact sets)

Published on 17 Mar 2026 - 23:24

score 806 · Answer 3 · 2026-03-16 22:30:01

806

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Compactness in $l^\infty$

Published on 16 Mar 2026 - 22:30

score 359 · Answer 4 · 2018-01-23 19:38:10

359

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Complement of a compact set in the Riemann sphere has countable many components.

Published on 23 Jan 2018 - 19:38

score 325 · Answer 5 · 2018-01-24 08:30:54

325

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Is D = $\{ (x,y,z) \in \mathbb{R}^3 \vert x^2 + y^2 +z^2 = 1, 0 < z < 1 \}$ homeomorphic to $S^1$ and to $\mathbb{R}^2\setminus \{(0,0)\}$

Published on 24 Jan 2018 - 8:30

score 230 · Answer 6 · 2018-01-26 21:09:51

230

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Can any compact subset of $\mathbb{R}$ be represented as the intersection of closed line segments?

Published on 26 Jan 2018 - 21:09

score 304 · Answer 7 · 2026-03-16 19:25:14

304

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Definition of Compactness

Published on 16 Mar 2026 - 19:25

score 272 · Answer 8 · 2026-03-25 06:12:49

272

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Definition of the approximation property of a Banach space

Published on 25 Mar 2026 - 6:12

score 979 · Answer 9 · 2026-03-17 05:57:48

979

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Finite set implies sequentially compact

Published on 17 Mar 2026 - 5:57

score 305 · Answer 10 · 2026-03-23 13:08:23

305

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Characterization of Compactness in $\ell^\infty$

Published on 23 Mar 2026 - 13:08

score 191 · Answer 11 · 2026-03-25 13:55:38

191

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Is a compact set of distributions still compact if we fix the marginal distribution?

Published on 25 Mar 2026 - 13:55

score 437 · Answer 12 · 2026-03-25 05:57:41

437

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Quasi-components in compact space

Published on 25 Mar 2026 - 5:57

score 67 · Answer 13 · 2018-01-31 00:27:32

67

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How do I prove that the character equals to the psuedocharacter in compact Hausdroff spaces?

Published on 31 Jan 2018 - 0:27

score 555 · Answer 14 · 2026-03-23 05:40:25

555

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Can a compact connected set in $\mathbb{R}^n$ with empty interior have positive Lebesgue measure?

Published on 23 Mar 2026 - 5:40

score 450 · Answer 15 · 2026-03-17 19:19:38

450

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A comparison of compactness in Product Topology and Order Topology

Published on 17 Mar 2026 - 19:19

List Question

step in proof Spivak about partition of unity

Spivak proof partition of unity: case 2 (countable compact sets)

Compactness in $l^\infty$

Complement of a compact set in the Riemann sphere has countable many components.

Is D = $\{ (x,y,z) \in \mathbb{R}^3 \vert x^2 + y^2 +z^2 = 1, 0 < z < 1 \}$ homeomorphic to $S^1$ and to $\mathbb{R}^2\setminus \{(0,0)\}$

Can any compact subset of $\mathbb{R}$ be represented as the intersection of closed line segments?

Definition of Compactness

Definition of the approximation property of a Banach space

Finite set implies sequentially compact

Characterization of Compactness in $\ell^\infty$

Is a compact set of distributions still compact if we fix the marginal distribution?

Quasi-components in compact space

How do I prove that the character equals to the psuedocharacter in compact Hausdroff spaces?

Can a compact connected set in $\mathbb{R}^n$ with empty interior have positive Lebesgue measure?

A comparison of compactness in Product Topology and Order Topology

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