Question

Does a series of Matchings with growing cardinality imply the existence of a Matching with their supremum?

score 33 · Answer 1 · 2026-04-09 07:54:09

33

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Does a series of Matchings with growing cardinality imply the existence of a Matching with their supremum?

Published on 09 Apr 2026 - 7:54

score 81 · Answer 2 · 2026-04-11 02:46:32

81

Views

Extending Ackermann's map to cardinals

Published on 11 Apr 2026 - 2:46

score 101 · Answer 3 · 2020-09-20 07:33:30

101

Views

Connected component in locally finite graph is countable

Published on 20 Sep 2020 - 7:33

score 73 · Answer 4 · 2026-04-10 19:25:16

73

Views

Cardinality and Bijection problem.

Published on 10 Apr 2026 - 19:25

score 40 · Answer 5 · 2026-04-12 05:04:01

40

Views

Locally finite abstract simplicial complex has only finite simplices?

Published on 12 Apr 2026 - 5:04

score 1.1k · Answer 6 · 2020-09-23 20:05:48

1.1k

Views

Find the cardinality of the following set?

Published on 23 Sep 2020 - 20:05

score 55 · Answer 7 · 2020-09-23 20:23:05

Is there a bijection from the set of sequences of 0s and 1s to the reals? Is there a bijection from the set of sequences of reals to the reals?

score 102 · Answer 8 · 2026-04-02 02:52:02

102

Views

Show cardinality between two sets $x=(0,x_1x_2x_3...)_{10}=\sum _{k=1}^{\infty }x_k 10^{-k}$

Published on 02 Apr 2026 - 2:52

score 185 · Answer 9 · 2026-04-10 17:52:45

185

Views

Is it consistent with ZFC that $2^{\aleph_0}$ is a fixed point of the aleph function?

Published on 10 Apr 2026 - 17:52

score 41 · Answer 10 · 2026-04-12 03:44:36

41

Views

Connected locally finite abstract simplicial complex is countable

Published on 12 Apr 2026 - 3:44

score 99 · Answer 11 · 2020-09-27 13:15:38

99

Views

Jech's Set Theory, Lemma 3.10

Published on 27 Sep 2020 - 13:15

score 199 · Answer 12 · 2026-04-11 02:38:33

199

Views

Infinite sum of cardinals

Published on 11 Apr 2026 - 2:38

score 65 · Answer 13 · 2020-09-28 04:31:26

65

Views

A bijection from $\mathbb{N}$ to $\mathbb{Z}^4$

Published on 28 Sep 2020 - 4:31

score 47 · Answer 14 · 2020-09-28 11:21:40

47

Views

If $\vert X\vert \geq \aleph_0$, is $\vert\{ A\subseteq X: \vert A \vert< \vert X\vert \} \vert<\vert 2^X \vert$?

Published on 28 Sep 2020 - 11:21

score 144 · Answer 15 · 2020-10-02 06:57:15

144

Views

How can I prove or disprove that the set of roots of the trigonometric polynomials with integer coefficients is denumerable?

Published on 02 Oct 2020 - 6:57

List Question

Does a series of Matchings with growing cardinality imply the existence of a Matching with their supremum?

Extending Ackermann's map to cardinals

Connected component in locally finite graph is countable

Cardinality and Bijection problem.

Locally finite abstract simplicial complex has only finite simplices?

Find the cardinality of the following set?

Is there a bijection from the set of sequences of 0s and 1s to the reals? Is there a bijection from the set of sequences of reals to the reals?

Show cardinality between two sets $x=(0,x_1x_2x_3...)_{10}=\sum _{k=1}^{\infty }x_k 10^{-k}$

Is it consistent with ZFC that $2^{\aleph_0}$ is a fixed point of the aleph function?

Connected locally finite abstract simplicial complex is countable

Jech's Set Theory, Lemma 3.10

Infinite sum of cardinals

A bijection from $\mathbb{N}$ to $\mathbb{Z}^4$

If $\vert X\vert \geq \aleph_0$, is $\vert\{ A\subseteq X: \vert A \vert< \vert X\vert \} \vert<\vert 2^X \vert$?

How can I prove or disprove that the set of roots of the trigonometric polynomials with integer coefficients is denumerable?

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