Question

Proving the existence of $\beth_\omega$ in ZF

score 131 · Answer 1 · 2026-03-22 14:28:42

131

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Proving the existence of $\beth_\omega$ in ZF

Published on 22 Mar 2026 - 14:28

score 92 · Answer 2 · 2018-02-26 11:08:26

92

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summing terms to the cardinality all possible subsets of a given set

Published on 26 Feb 2018 - 11:08

score 407 · Answer 3 · 2026-03-25 01:27:58

407

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Assuming ZF and the axiom of constructibility, $\alpha > \omega, V_\alpha = L_\alpha \iff \alpha = \aleph_\alpha$

Published on 25 Mar 2026 - 1:27

score 73 · Answer 4 · 2018-02-27 09:55:40

73

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Countability shifts

Published on 27 Feb 2018 - 9:55

score 131 · Answer 5 · 2018-02-28 03:14:52

131

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Do there exist any subsets of $\mathbb{R}$ with positive measure but not of size continuum?

Published on 28 Feb 2018 - 3:14

score 2.2k · Answer 6 · 2018-03-01 05:18:55

2.2k

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P(Z+) is uncountable (Power set of Positive Integers)

Published on 01 Mar 2018 - 5:18

score 428 · Answer 7 · 2018-03-03 07:47:54

428

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Sample Space Size for unit interval [0,1] Probability

Published on 03 Mar 2018 - 7:47

score 43 · Answer 8 · 2026-03-25 04:39:42

43

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Confusion regarding cardinality of sets

Published on 25 Mar 2026 - 4:39

score 640 · Answer 9 · 2018-03-05 02:25:21

640

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Understanding proper classes vs sets: why the set of all cardinal numbers cannot exist?

Published on 05 Mar 2018 - 2:25

score 76 · Answer 10 · 2026-03-22 19:26:14

76

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How to calculate the cardinality of following set

Published on 22 Mar 2026 - 19:26

score 82 · Answer 11 · 2018-03-08 23:48:46

82

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How can the cardinalities of a set and its Power set be the same?

Published on 08 Mar 2018 - 23:48

score 1.2k · Answer 12 · 2018-03-09 10:28:53

1.2k

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Looking for a good book to read about limit ordinals, aleph and beth numbers and AC

Published on 09 Mar 2018 - 10:28

score 89 · Answer 13 · 2026-03-25 07:43:48

89

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Symmetric groups over an infinite number of elements.

Published on 25 Mar 2026 - 7:43

score 253 · Answer 14 · 2026-03-21 01:58:02

253

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Does ZFC + the Axiom of Constructibility imply the nonexistence of inaccessible cardinals?

Published on 21 Mar 2026 - 1:58

score 455 · Answer 15 · 2018-03-19 20:05:13

455

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Cardinality of a set that contains duplicate sets

Published on 19 Mar 2018 - 20:05

List Question

Proving the existence of $\beth_\omega$ in ZF

summing terms to the cardinality all possible subsets of a given set

Assuming ZF and the axiom of constructibility, $\alpha > \omega, V_\alpha = L_\alpha \iff \alpha = \aleph_\alpha$

Countability shifts

Do there exist any subsets of $\mathbb{R}$ with positive measure but not of size continuum?

P(Z+) is uncountable (Power set of Positive Integers)

Sample Space Size for unit interval [0,1] Probability

Confusion regarding cardinality of sets

Understanding proper classes vs sets: why the set of all cardinal numbers cannot exist?

How to calculate the cardinality of following set

How can the cardinalities of a set and its Power set be the same?

Looking for a good book to read about limit ordinals, aleph and beth numbers and AC

Symmetric groups over an infinite number of elements.

Does ZFC + the Axiom of Constructibility imply the nonexistence of inaccessible cardinals?

Cardinality of a set that contains duplicate sets

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