Question

$(n-1)$-Hausdorff measure of orthogonal projection onto an hyperplane of compact sets of $\Bbb R^n$

score 91 · Answer 1 · 2026-03-25 14:25:17

91

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$(n-1)$-Hausdorff measure of orthogonal projection onto an hyperplane of compact sets of $\Bbb R^n$

Published on 25 Mar 2026 - 14:25

score 393 · Answer 2 · 2020-05-01 17:41:30

393

Views

The Set of All Vectors (in $\mathbb{R}^n$) whose Components Sum to 1 is Compact

Published on 01 May 2020 - 17:41

score 76 · Answer 3 · 2020-05-02 04:42:28

76

Views

Proving that if $E\subseteq D$ is relatively open in $D$ then $f(E)$ is relatively open in $f(D)$

Published on 02 May 2020 - 4:42

score 187 · Answer 4 · 2020-05-02 10:28:29

187

Views

How to prove a set of sequences is compact?

Published on 02 May 2020 - 10:28

score 114 · Answer 5 · 2020-05-02 17:59:01

114

Views

Question about compact sets

Published on 02 May 2020 - 17:59

score 26 · Answer 6 · 2020-05-03 02:14:27

26

Views

How to prove the sequentially compact of a set of sequences.

Published on 03 May 2020 - 2:14

score 36 · Answer 7 · 2026-03-29 17:27:32

36

Views

Some questions about the proof of the properties of the uniform equivalent.

Published on 29 Mar 2026 - 17:27

score 322 · Answer 8 · 2020-05-03 17:11:24

322

Views

Compact metric spaces without continuous surjective functions between them.

Published on 03 May 2020 - 17:11

score 61 · Answer 9 · 2026-03-26 02:55:04

61

Views

About the quotient space $Z/p^iZ$.

Published on 26 Mar 2026 - 2:55

score 24 · Answer 10 · 2020-05-05 21:23:05

24

Views

Limit Points and Infinite Subsets of a Compact Set (Proof Verification)

Published on 05 May 2020 - 21:23

score 240 · Answer 11 · 2020-05-06 16:26:46

240

Views

Prove that a compact set in the real numbers is a bounded set.

Published on 06 May 2020 - 16:26

score 49 · Answer 12 · 2020-05-06 18:30:16

Suppose B is a compact set in Real numbers and A is a subset of B. Prove that if A is an infinite set, then A has a cluster point.

score 354 · Answer 13 · 2020-05-07 02:00:27

354

Views

Proving the converse of "A Cartesian product of a finite number of compact spaces is itself compact."

Published on 07 May 2020 - 2:00

score 109 · Answer 14 · 2020-05-07 02:05:27

Carothers Ch. 8 q. 32: equivalence of $\bigcap_{i=1}^\infty N_i \ne \emptyset$ for all closed/nested $N_i\subset M$ and covering compactness.

score 368 · Answer 15 · 2020-05-07 11:15:04

368

Views

unit sphere in $l^\infty$ is not compact

Published on 07 May 2020 - 11:15

List Question

$(n-1)$-Hausdorff measure of orthogonal projection onto an hyperplane of compact sets of $\Bbb R^n$

The Set of All Vectors (in $\mathbb{R}^n$) whose Components Sum to 1 is Compact

Proving that if $E\subseteq D$ is relatively open in $D$ then $f(E)$ is relatively open in $f(D)$

How to prove a set of sequences is compact?

Question about compact sets

How to prove the sequentially compact of a set of sequences.

Some questions about the proof of the properties of the uniform equivalent.

Compact metric spaces without continuous surjective functions between them.

About the quotient space $Z/p^iZ$.

Limit Points and Infinite Subsets of a Compact Set (Proof Verification)

Prove that a compact set in the real numbers is a bounded set.

Suppose B is a compact set in Real numbers and A is a subset of B. Prove that if A is an infinite set, then A has a cluster point.

Proving the converse of "A Cartesian product of a finite number of compact spaces is itself compact."

Carothers Ch. 8 q. 32: equivalence of $\bigcap_{i=1}^\infty N_i \ne \emptyset$ for all closed/nested $N_i\subset M$ and covering compactness.

unit sphere in $l^\infty$ is not compact

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