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15
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Shooting a club is Baire

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#set-theory #forcing
47
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Why every small set is a moderate set, but not conversely (as universe itself)?

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#category-theory #set-theory
622
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Applications of Zorn's lemma with orderings other than set inclusion

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#reference-request #set-theory #axiom-of-choice
114
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Weakening of the perfect set property

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#reference-request #set-theory #forcing
294
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Redundant axioms IN ZFC

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#set-theory
441
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What is the analogue to this cardinal arithmetic theorem for infinite products?

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#set-theory #cardinals
79
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Recursive way of calculating cofinality of ordinals

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#set-theory #order-theory #ordinals
69
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Are there uncountable cardinals $\kappa$ such that $|\kappa\cap\mathsf{Card}| = \kappa$?

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#set-theory #cardinals
134
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If $X$ and $Y$ are $\in$–isomorphic transitive sets, then $X = Y$ and the identity on $X$ is the unique $\in$–isomorphism $f\colon (X,\in)\to(Y,\in)$

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#set-theory
131
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What is the strongest known proxi-finite theory?

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#set-theory #first-order-logic #large-cardinals
29
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Domain of the neat reduct of a cylindric set algebra

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#abstract-algebra #set-theory
536
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Show that continuous function from omega_1 to R is eventually constant

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#general-topology #set-theory #cardinals
71
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Understanding how to construct a tall narrow tree

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#set-theory #forcing
95
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Size issues in the reduction of Colimits to a Coequalizer of Coproducts.

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#category-theory #set-theory #limits-colimits
93
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Difference between class $\{x\mid x\in Y\}$ and $Y$ with $Y$ being a set?

Published on
#logic #set-theory

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