Question

Comparing how "high" the ordinals go in one model of ZFC versus another.

score 89 · Answer 1 · 2013-02-22 01:25:02

89

Views

Comparing how "high" the ordinals go in one model of ZFC versus another.

Published on 22 Feb 2013 - 1:25

score 459 · Answer 2 · 2013-02-22 09:39:14

459

Views

Does there exist a set theory where the following non well-founded definition of the ordinals is possible?

Published on 22 Feb 2013 - 9:39

score 169 · Answer 3 · 2013-02-23 09:18:50

169

Views

Disjoint unions of limited cardinality: is the following conjecture/proof correct?

Published on 23 Feb 2013 - 9:18

score 38 · Answer 4 · 2013-02-24 02:21:29

38

Views

Well-ordered family of sequences each decreasing faster than the earlier ones?

Published on 24 Feb 2013 - 2:21

score 511 · Answer 5 · 2013-02-26 15:00:40

511

Views

what does it mean that constructible universe is definable from ordinals?

Published on 26 Feb 2013 - 15:00

score 355 · Answer 6 · 2013-03-01 12:01:47

355

Views

Relationship between ordinals and rank of well founded relations on $\mathbb N$

Published on 01 Mar 2013 - 12:01

score 252 · Answer 7 · 2026-04-02 23:44:28

252

Views

What's the rank of this well founded relation?

Published on 02 Apr 2026 - 23:44

score 179 · Answer 8 · 2026-04-05 16:18:50

179

Views

$\omega_1^{CK} - \omega$ - infinite or finite set? And boundary

Published on 05 Apr 2026 - 16:18

score 6.4k · Answer 9 · 2013-03-02 19:27:51

6.4k

Views

Ordinal exponentiation - $2^{\omega}=\omega$

Published on 02 Mar 2013 - 19:27

score 551 · Answer 10 · 2026-04-02 23:41:02

551

Views

Ordinal interpretation of Friedman's $n$?

Published on 02 Apr 2026 - 23:41

score 489 · Answer 11 · 2013-03-05 17:41:13

489

Views

Induction over all ordinal numbers.

Published on 05 Mar 2013 - 17:41

score 52 · Answer 12 · 2013-03-07 11:36:20

52

Views

How to show $\alpha^n$ is star countable for any ordinal $\alpha$?

Published on 07 Mar 2013 - 11:36

score 174 · Answer 13 · 2013-03-09 03:05:26

174

Views

A question on $\omega_1$

Published on 09 Mar 2013 - 3:05

score 83 · Answer 14 · 2013-03-09 10:26:37

83

Views

A question on $\omega_2$

Published on 09 Mar 2013 - 10:26

score 63 · Answer 15 · 2013-03-09 11:50:49

63

Views

Do we have $\overline{\bigcup\{A_\beta: \beta<\alpha\}}=\bigcup\{ \overline{A_\beta}: \beta<\alpha\}$

Published on 09 Mar 2013 - 11:50

List Question

Comparing how "high" the ordinals go in one model of ZFC versus another.

Does there exist a set theory where the following non well-founded definition of the ordinals is possible?

Disjoint unions of limited cardinality: is the following conjecture/proof correct?

Well-ordered family of sequences each decreasing faster than the earlier ones?

what does it mean that constructible universe is definable from ordinals?

Relationship between ordinals and rank of well founded relations on $\mathbb N$

What's the rank of this well founded relation?

$\omega_1^{CK} - \omega$ - infinite or finite set? And boundary

Ordinal exponentiation - $2^{\omega}=\omega$

Ordinal interpretation of Friedman's $n$?

Induction over all ordinal numbers.

How to show $\alpha^n$ is star countable for any ordinal $\alpha$?

A question on $\omega_1$

A question on $\omega_2$

Do we have $\overline{\bigcup\{A_\beta: \beta<\alpha\}}=\bigcup\{ \overline{A_\beta}: \beta<\alpha\}$

Trending Questions

Popular # Hahtags

Popular Questions