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What does Paul Halmos mean here?

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#set-theory #axioms
63
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Equivalence of two definitions of weak compactness property

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#logic #set-theory #large-cardinals
315
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Weakly inaccessible cardinal such that $\kappa^{<\kappa}=\kappa$

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#set-theory #cardinals #large-cardinals
151
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Ordinal sum inequality - Proof check

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#proof-verification #set-theory #ordinals
784
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Which comes first? Set theory or first order logic?

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#logic #set-theory
170
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Clarification on Jech's Proof of Fodor's Lemma

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#set-theory
221
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Ways to prove set equality

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#abstract-algebra #set-theory
312
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Frege's Math Foundation, Russell's Paradox, and Current Theories

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#set-theory
1.1k
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Definitions of $2$ in set theory?

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#set-theory
1.7k
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How to construct natural numbers by set theory?

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#set-theory #definition #foundations #natural-numbers
183
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Proving a certain type of topology is discrete without the axiom of choice

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#general-topology #set-theory #axiom-of-choice
155
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Unsure of what to think about negation of Continuum Hypothesis, a need of clarification

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#set-theory #cardinals
140
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Proving $\operatorname{Card} (\omega_1)\leq \operatorname{Card} (P(\mathbb{N}))$

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#set-theory #cardinals #ordinals
273
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Proof of Zorn's lemma clarification

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#set-theory #self-learning #axiom-of-choice
69
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First ZF axiom.

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#set-theory

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