Question

Definitions of ordinal addition and multiplication

score 37 · Answer 1 · 2022-03-03 19:50:15

37

Views

Definitions of ordinal addition and multiplication

Published on 03 Mar 2022 - 19:50

score 181 · Answer 2 · 2026-03-25 07:48:33

181

Views

Iterated $\Pi^1_1$-reflection and non-Gandiness underrepresented in ordinal analyses?

Published on 25 Mar 2026 - 7:48

score 288 · Answer 3 · 2026-03-29 11:42:38

288

Views

Is there a measurable function from $[0,1]$ to $ω_1$?

Published on 29 Mar 2026 - 11:42

score 165 · Answer 4 · 2022-03-05 16:49:52

165

Views

Correct cardinals vs Stable ordinals

Published on 05 Mar 2022 - 16:49

score 59 · Answer 5 · 2022-03-06 08:30:42

59

Views

Transfinite limit of an orbit of a dynamical system and rationalizability of symmetric games.

Published on 06 Mar 2022 - 8:30

score 176 · Answer 6 · 2022-03-11 06:33:27

176

Views

Is every limit ordinal an infinite sum of smaller ordinals?

Published on 11 Mar 2022 - 6:33

score 151 · Answer 7 · 2026-03-30 14:18:03

151

Views

Minimal models in strong set theories

Published on 30 Mar 2026 - 14:18

score 156 · Answer 8 · 2026-03-25 07:49:00

156

Views

Link between a theory’s proof-theoretic ordinal and the fastest-growing function it can prove total

Published on 25 Mar 2026 - 7:49

score 254 · Answer 9 · 2022-03-16 22:50:43

254

Views

The definition of cofinality of an ordinal

Published on 16 Mar 2022 - 22:50

score 295 · Answer 10 · 2022-03-17 16:33:14

295

Views

Is true that $\bigcup α=α$ if $\alpha$ is a limit ordinal?

Published on 17 Mar 2022 - 16:33

score 94 · Answer 11 · 2022-03-17 19:23:31

94

Views

The axiom of regularity in a fact about $V_\omega$

Published on 17 Mar 2022 - 19:23

score 130 · Answer 12 · 2022-03-17 21:18:34

130

Views

About the definition of hereditary cardinality

Published on 17 Mar 2022 - 21:18

score 56 · Answer 13 · 2022-03-17 23:35:25

56

Views

Find the smallest cardinal $\kappa$ such that $\omega + \omega$ is the supremum of $\kappa$ smaller ordinals

Published on 17 Mar 2022 - 23:35

score 97 · Answer 14 · 2026-03-25 20:09:39

97

Views

Explain why transfinite induction does not assume that a property must be true for zero.

Published on 25 Mar 2026 - 20:09

score 149 · Answer 15 · 2022-03-18 18:39:57

149

Views

The relation between rank and von Neumann's Hierarchy

Published on 18 Mar 2022 - 18:39

List Question

Definitions of ordinal addition and multiplication

Iterated $\Pi^1_1$-reflection and non-Gandiness underrepresented in ordinal analyses?

Is there a measurable function from $[0,1]$ to $ω_1$?

Correct cardinals vs Stable ordinals

Transfinite limit of an orbit of a dynamical system and rationalizability of symmetric games.

Is every limit ordinal an infinite sum of smaller ordinals?

Minimal models in strong set theories

Link between a theory’s proof-theoretic ordinal and the fastest-growing function it can prove total

The definition of cofinality of an ordinal

Is true that $\bigcup α=α$ if $\alpha$ is a limit ordinal?

The axiom of regularity in a fact about $V_\omega$

About the definition of hereditary cardinality

Find the smallest cardinal $\kappa$ such that $\omega + \omega$ is the supremum of $\kappa$ smaller ordinals

Explain why transfinite induction does not assume that a property must be true for zero.

The relation between rank and von Neumann's Hierarchy

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