Question

Superfluous proof in textbook? (For intersection of sequence of dense, open subsets of complete metric space is dense)

score 51 · Answer 1 · 2026-04-30 18:02:34

51

Views

Superfluous proof in textbook? (For intersection of sequence of dense, open subsets of complete metric space is dense)

Published on 30 Apr 2026 - 18:02

score 72 · Answer 2 · 2026-04-11 14:44:28

72

Views

Is it true that the intersection of two dense subspace of a linear normed space is also dense provided that one of them is of finite codimension?

Published on 11 Apr 2026 - 14:44

score 39 · Answer 3 · 2026-04-30 23:49:48

39

Views

A dense set of real numbers with predetermined Lebesgue measure

Published on 30 Apr 2026 - 23:49

score 32 · Answer 4 · 2026-04-30 23:38:11

32

Views

Density of matrix functions with non-zero determinant

Published on 30 Apr 2026 - 23:38

score 56 · Answer 5 · 2026-05-01 05:05:31

56

Views

Finitely generated dense subgroup of an unitary group

Published on 01 May 2026 - 5:05

score 68 · Answer 6 · 2026-04-29 15:02:27

68

Views

Nearly covering the complement of a nowhere dense set

Published on 29 Apr 2026 - 15:02

score 26 · Answer 7 · 2026-05-01 03:43:28

26

Views

Showing a certain dense subset of $\mathcal{C}^1([0,1]^2,\mathbb{R}^4)$ is residual.

Published on 01 May 2026 - 3:43

score 17 · Answer 8 · 2026-05-01 00:28:42

17

Views

Showing a Certain Set of Maps is dense

Published on 01 May 2026 - 0:28

score 112 · Answer 9 · 2026-05-03 04:15:24

112

Views

Extension of closed operator densely defined

Published on 03 May 2026 - 4:15

score 30 · Answer 10 · 2026-04-30 15:39:22

30

Views

Finite index dense normal subgroups of completely metrizable groups

Published on 30 Apr 2026 - 15:39

score 47 · Answer 11 · 2026-04-16 09:19:03

47

Views

Lebesgue measure of complement of Q-invariant set

Published on 16 Apr 2026 - 9:19

score 89 · Answer 12 · 2026-05-10 11:41:14

89

Views

Prove that simple functions are not dense in weak $L^{p,\infty}$

Published on 10 May 2026 - 11:41

score 29 · Answer 13 · 2026-05-02 20:27:58

29

Views

intersection of sets not dense implies interior of closure of intersection is not dense

Published on 02 May 2026 - 20:27

score 79 · Answer 14 · 2026-04-14 09:23:23

79

Views

Topology with given dense sets

Published on 14 Apr 2026 - 9:23

score 68 · Answer 15 · 2026-04-12 15:44:05

68

Views

Topology with given infinite dense sets

Published on 12 Apr 2026 - 15:44

List Question

Superfluous proof in textbook? (For intersection of sequence of dense, open subsets of complete metric space is dense)

Is it true that the intersection of two dense subspace of a linear normed space is also dense provided that one of them is of finite codimension?

A dense set of real numbers with predetermined Lebesgue measure

Density of matrix functions with non-zero determinant

Finitely generated dense subgroup of an unitary group

Nearly covering the complement of a nowhere dense set

Showing a certain dense subset of $\mathcal{C}^1([0,1]^2,\mathbb{R}^4)$ is residual.

Showing a Certain Set of Maps is dense

Extension of closed operator densely defined

Finite index dense normal subgroups of completely metrizable groups

Lebesgue measure of complement of Q-invariant set

Prove that simple functions are not dense in weak $L^{p,\infty}$

intersection of sets not dense implies interior of closure of intersection is not dense

Topology with given dense sets

Topology with given infinite dense sets

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