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15
Math.TechQA.Club
2020-02-22 13:29:20
699
Views
Closed iff sequentially closed in metric spaces and the Axiom of Countable Choice
Published on
22 Feb 2020 - 13:29
#general-topology
#metric-spaces
#axiom-of-choice
227
Views
Characterization of open sets
Published on
23 Feb 2020 - 13:18
#general-topology
#metric-spaces
#axiom-of-choice
263
Views
Question regarding a proof of Zorn's Lemma
Published on
24 Feb 2020 - 17:08
#set-theory
#proof-explanation
#axiom-of-choice
203
Views
Particular choice function without Axiom of Choice
Published on
29 Feb 2020 - 13:47
#set-theory
#first-order-logic
#axiom-of-choice
165
Views
Implicit $AC$ in Munkres' Proof? (Completely Regular Spaces)
Published on
29 Feb 2020 - 13:49
#general-topology
#axiom-of-choice
223
Views
Axiom of choice and first order logic
Published on
01 Mar 2020 - 23:36
#set-theory
#axiom-of-choice
44
Views
Countable union of disjoint finite sets is countable
Published on
03 Mar 2020 - 16:41
#elementary-set-theory
#axiom-of-choice
136
Views
equivalent formulation of axiom of choice (Analysis 1 by Tao)
Published on
04 Mar 2020 - 4:57
#real-analysis
#elementary-set-theory
#axiom-of-choice
193
Views
$AC_\omega(^\omega\omega)$ implies that $\omega_1$ is regular.
Published on
05 Mar 2020 - 12:06
#set-theory
#solution-verification
#axiom-of-choice
390
Views
Does proving that closed subset of Polish space is Polish require axiom of countable choice?
Published on
23 Feb 2026 - 4:57
#solution-verification
#axiom-of-choice
#descriptive-set-theory
#polish-spaces
276
Views
Maximal principles
Published on
09 Mar 2020 - 15:34
#set-theory
#solution-verification
#alternative-proof
#axiom-of-choice
221
Views
Is well-ordered Dedekind-finite set finite?
Published on
26 Mar 2026 - 9:40
#set-theory
#axiom-of-choice
#ordinals
#well-orders
119
Views
Basic Fraenkel model in Jech's "The Axiom of Choice"
Published on
15 Mar 2020 - 16:13
#permutations
#set-theory
#axiom-of-choice
146
Views
A question about Dedekind-infinite sets and Peano natural integers.
Published on
26 Mar 2026 - 17:31
#logic
#axiom-of-choice
#axioms
#natural-numbers
#peano-axioms
73
Views
Does $\operatorname{card} \operatorname{ran} f \leq \operatorname{card} \operatorname{dom} f$ imply choice?
Published on
23 Mar 2020 - 15:02
#elementary-set-theory
#axiom-of-choice
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