Question

Cantor normal form

score 652 · Answer 1 · 2021-05-04 20:06:15

652

Views

Cantor normal form

Published on 04 May 2021 - 20:06

score 108 · Answer 2 · 2021-05-05 10:29:34

108

Views

Definition of sum of ordinals

Published on 05 May 2021 - 10:29

score 173 · Answer 3 · 2021-05-08 13:35:30

173

Views

Distributive law on right in ordinals

Published on 08 May 2021 - 13:35

score 99 · Answer 4 · 2021-05-10 13:55:14

99

Views

How can OD be not transitive

Published on 10 May 2021 - 13:55

score 103 · Answer 5 · 2021-05-16 19:02:03

103

Views

Jech's proof of ${|\omega_\alpha|}^2 = |\omega_\alpha|$

Published on 16 May 2021 - 19:02

score 69 · Answer 6 · 2021-05-18 07:38:33

69

Views

Would ZF result from this Zermelo \ von Neumann ordinal race?

Published on 18 May 2021 - 7:38

score 209 · Answer 7 · 2021-05-22 23:48:58

209

Views

Do limit ordinal always have a preceding limit ordinal

Published on 22 May 2021 - 23:48

score 115 · Answer 8 · 2021-05-25 20:04:30

115

Views

Why does the back and forth method fail to prove that, for each cardinality, any dense linear order without endpoints is unique up to isomorphism?

Published on 25 May 2021 - 20:04

score 90 · Answer 9 · 2021-05-27 09:53:01

90

Views

Confusion about ordinals in Devlin "The Joy of Sets" Theorem 1.7.7

Published on 27 May 2021 - 9:53

score 85 · Answer 10 · 2021-05-28 09:53:20

85

Views

Is the output of a Veblen function larger than its input?

Published on 28 May 2021 - 9:53

score 129 · Answer 11 · 2021-05-29 12:40:36

129

Views

How can I tell if some set is a von Neumann stage $V_\alpha$ for some ordinal $\alpha$?

Published on 29 May 2021 - 12:40

score 84 · Answer 12 · 2021-06-05 17:12:13

84

Views

How could I prove $\omega_1$ is an uncountable ordinal without appealing to Foundation?

Published on 05 Jun 2021 - 17:12

score 141 · Answer 13 · 2021-06-07 10:42:21

141

Views

Question about ordinal exponentiation.

Published on 07 Jun 2021 - 10:42

score 64 · Answer 14 · 2021-06-08 06:28:59

64

Views

Show the set of ordinals less than a certain cardinal is uncountable

Published on 08 Jun 2021 - 6:28

score 119 · Answer 15 · 2021-06-08 06:51:59

119

Views

Is there an ordinal satisfying $\xi$ = $\omega$+$\xi$?

Published on 08 Jun 2021 - 6:51

List Question

Cantor normal form

Definition of sum of ordinals

Distributive law on right in ordinals

How can OD be not transitive

Jech's proof of ${|\omega_\alpha|}^2 = |\omega_\alpha|$

Would ZF result from this Zermelo \ von Neumann ordinal race?

Do limit ordinal always have a preceding limit ordinal

Why does the back and forth method fail to prove that, for each cardinality, any dense linear order without endpoints is unique up to isomorphism?

Confusion about ordinals in Devlin "The Joy of Sets" Theorem 1.7.7

Is the output of a Veblen function larger than its input?

How can I tell if some set is a von Neumann stage $V_\alpha$ for some ordinal $\alpha$?

How could I prove $\omega_1$ is an uncountable ordinal without appealing to Foundation?

Question about ordinal exponentiation.

Show the set of ordinals less than a certain cardinal is uncountable

Is there an ordinal satisfying $\xi$ = $\omega$+$\xi$?

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