Question

Ordinals that satisfy $\alpha = \aleph_\alpha$ with cofinality $\kappa$

score 2k · Answer 1 · 2014-01-10 11:10:44

2k

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Ordinals that satisfy $\alpha = \aleph_\alpha$ with cofinality $\kappa$

Published on 10 Jan 2014 - 11:10

score 40 · Answer 2 · 2014-01-10 17:30:27

40

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Question about cardinals.

Published on 10 Jan 2014 - 17:30

score 66 · Answer 3 · 2014-01-12 01:03:31

66

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Function composition giving the same value

Published on 12 Jan 2014 - 1:03

score 298 · Answer 4 · 2026-03-29 15:53:24

298

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Injective or constant function on measurable cardinal

Published on 29 Mar 2026 - 15:53

score 281 · Answer 5 · 2014-01-12 16:56:35

281

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The cardinal characteristic $\mathfrak d$

Published on 12 Jan 2014 - 16:56

score 141 · Answer 6 · 2014-01-12 20:27:05

141

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How many functions $f^m(n) = n$ over $\mathbb{N}$?

Published on 12 Jan 2014 - 20:27

score 263 · Answer 7 · 2026-03-26 20:40:04

263

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How to prove that $\omega_1 \leq \mathfrak p$

Published on 26 Mar 2026 - 20:40

score 147 · Answer 8 · 2014-01-13 13:04:54

147

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A verification for a proof that $\omega_1 \leq \mathfrak s$

Published on 13 Jan 2014 - 13:04

score 203 · Answer 9 · 2026-03-26 20:39:43

203

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How to show that $\mathfrak s \leq \mathfrak d$

Published on 26 Mar 2026 - 20:39

score 271 · Answer 10 · 2026-03-26 20:38:55

271

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$\mathfrak b \leq \mathfrak r$. Is this proof correct?

Published on 26 Mar 2026 - 20:38

score 613 · Answer 11 · 2026-04-03 10:11:13

613

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Some questions about elementary set theory (cardinal and ordinal numbers)

Published on 03 Apr 2026 - 10:11

score 612 · Answer 12 · 2014-01-18 11:05:05

612

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Supremum of a set of cardinalities.

Published on 18 Jan 2014 - 11:05

score 1.6k · Answer 13 · 2014-01-19 15:50:24

1.6k

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What's "the catch" in this question?

Published on 19 Jan 2014 - 15:50

score 750 · Answer 14 · 2014-01-20 11:17:57

750

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$\aleph$ function fixed points below a weakly inaccessible cardinal are a club set

Published on 20 Jan 2014 - 11:17

score 93 · Answer 15 · 2014-01-22 12:55:06

93

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Find the cardinal of the set of all infinite sequences of $0,1,-1$ such that each sequence contains each digit at least once - Check my answer

Published on 22 Jan 2014 - 12:55

List Question

Ordinals that satisfy $\alpha = \aleph_\alpha$ with cofinality $\kappa$

Question about cardinals.

Function composition giving the same value

Injective or constant function on measurable cardinal

The cardinal characteristic $\mathfrak d$

How many functions $f^m(n) = n$ over $\mathbb{N}$?

How to prove that $\omega_1 \leq \mathfrak p$

A verification for a proof that $\omega_1 \leq \mathfrak s$

How to show that $\mathfrak s \leq \mathfrak d$

$\mathfrak b \leq \mathfrak r$. Is this proof correct?

Some questions about elementary set theory (cardinal and ordinal numbers)

Supremum of a set of cardinalities.

What's "the catch" in this question?

$\aleph$ function fixed points below a weakly inaccessible cardinal are a club set

Find the cardinal of the set of all infinite sequences of $0,1,-1$ such that each sequence contains each digit at least once - Check my answer

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