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15
Math.TechQA.Club
2013-05-31 20:38:08
189
Views
Equivalence between these definitions of ordinal numbers
Published on
31 May 2013 - 20:38
#ordinals
2.4k
Views
Countable ordinals are embeddable in the rationals $\Bbb Q$ -- proofs and their use of AC
Published on
01 Jun 2013 - 8:32
#set-theory
#order-theory
#axiom-of-choice
#ordinals
462
Views
Largest provably existing ordinal in ZF without power set
Published on
01 Jun 2013 - 10:35
#set-theory
#ordinals
118
Views
Base change and ordinals
Published on
04 Jun 2013 - 9:23
#set-theory
#ordinals
335
Views
Definition of ordinal exponentiation
Published on
06 Jun 2013 - 12:28
#set-theory
#ordinals
268
Views
Basic examples of ordinals
Published on
07 Jun 2013 - 10:09
#elementary-set-theory
#ordinals
566
Views
Infinite combinatorial games
Published on
23 Feb 2026 - 10:07
#set-theory
#ordinals
#infinitary-combinatorics
#infinite-games
94
Views
Existence of arbitrarily large ordinal subgroups in a group structure on a regular cardinal
Published on
30 Mar 2026 - 11:58
#model-theory
#ordinals
#universal-algebra
98
Views
Generalizing the central series to ordinal length
Published on
08 Jun 2013 - 16:18
#group-theory
#ordinals
290
Views
Stationary sets
Published on
09 Jun 2013 - 14:14
#set-theory
#ordinals
186
Views
Compactifications of limit ordinals
Published on
09 Jun 2013 - 19:14
#general-topology
#ordinals
414
Views
Which ordinals embed in $2^\omega$ ordered by inclusion?
Published on
25 Mar 2026 - 22:03
#set-theory
#order-theory
#ordinals
#transfinite-recursion
216
Views
A club in $\omega_1$ induced by a bijection
Published on
12 Jun 2013 - 14:18
#set-theory
#ordinals
186
Views
Proving $\alpha+(\beta+\gamma) = (\alpha+\beta)+\gamma$ for ordinals
Published on
12 Jun 2013 - 17:54
#set-theory
#ordinals
466
Views
Continuous surjective functions $\omega_1 \to \omega_1$.
Published on
12 Jun 2013 - 23:11
#general-topology
#continuity
#ordinals
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