Question

Every well-ordered set is isomorphic to a unique ordinal

score 3k · Answer 1 · 2026-03-26 14:20:38

3k

Views

Every well-ordered set is isomorphic to a unique ordinal

Published on 26 Mar 2026 - 14:20

score 283 · Answer 2 · 2016-11-10 22:03:42

283

Views

Set Theory - Ordinal Exponents - Arithmetic

Published on 10 Nov 2016 - 22:03

score 50 · Answer 3 · 2016-11-15 17:16:47

50

Views

A few questions about Example $3.15$ from the paper $I^K\text{-}\textit{convergence}$ by Sleziak & Macaj

Published on 15 Nov 2016 - 17:16

score 635 · Answer 4 · 2026-03-26 14:24:52

635

Views

Is an algorithm known for ordering natural numbers in the $\epsilon_0$ ordinal?

Published on 26 Mar 2026 - 14:24

score 169 · Answer 5 · 2016-11-23 12:09:27

169

Views

weakening of Fodor's theorem

Published on 23 Nov 2016 - 12:09

score 88 · Answer 6 · 2016-11-27 22:14:14

88

Views

Range of an ordinal valued function

Published on 27 Nov 2016 - 22:14

score 190 · Answer 7 · 2026-03-25 07:41:41

190

Views

Universal linear orders without $\omega_1$ or $\omega_1^*$ subsets.

Published on 25 Mar 2026 - 7:41

score 118 · Answer 8 · 2016-12-03 03:59:39

118

Views

Can ordinal arithmetic prove 1+1=2?

Published on 03 Dec 2016 - 3:59

score 60 · Answer 9 · 2026-03-26 01:14:36

60

Views

$\Box_{\kappa}$ principle, unknown derivation of its property

Published on 26 Mar 2026 - 1:14

score 369 · Answer 10 · 2016-12-13 14:17:07

369

Views

What is $0^0$, in ordinal exponentiation?

Published on 13 Dec 2016 - 14:17

score 2.3k · Answer 11 · 2016-12-20 18:25:22

2.3k

Views

How should I understand the formal definition of cardinal numbers using ordinal numbers

Published on 20 Dec 2016 - 18:25

score 233 · Answer 12 · 2016-12-23 13:48:05

233

Views

How to define the conception of a sum without the operation of addition?

Published on 23 Dec 2016 - 13:48

score 824 · Answer 13 · 2026-03-25 11:14:56

824

Views

To prove $\omega_1 \cup \{\omega_1\} $ is not first countable but $\omega_1$ is

Published on 25 Mar 2026 - 11:14

score 305 · Answer 14 · 2016-12-28 00:03:20

305

Views

An ordinal number α which satisfies $2^\alpha=\alpha$

Published on 28 Dec 2016 - 0:03

score 176 · Answer 15 · 2026-03-26 16:03:58

176

Views

limit ordinal well-founded

Published on 26 Mar 2026 - 16:03

List Question

Every well-ordered set is isomorphic to a unique ordinal

Set Theory - Ordinal Exponents - Arithmetic

A few questions about Example $3.15$ from the paper $I^K\text{-}\textit{convergence}$ by Sleziak & Macaj

Is an algorithm known for ordering natural numbers in the $\epsilon_0$ ordinal?

weakening of Fodor's theorem

Range of an ordinal valued function

Universal linear orders without $\omega_1$ or $\omega_1^*$ subsets.

Can ordinal arithmetic prove 1+1=2?

$\Box_{\kappa}$ principle, unknown derivation of its property

What is $0^0$, in ordinal exponentiation?

How should I understand the formal definition of cardinal numbers using ordinal numbers

How to define the conception of a sum without the operation of addition?

To prove $\omega_1 \cup \{\omega_1\} $ is not first countable but $\omega_1$ is

An ordinal number α which satisfies $2^\alpha=\alpha$

limit ordinal well-founded

Trending Questions

Popular # Hahtags

Popular Questions