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15
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I took the clubbiness of $\Pi^1_2$ sets for granted

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#logic #set-theory #descriptive-set-theory
186
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If $f:X\to Y$ is continuous, then the induced map $F:K(X)\to K(Y)$ is continuous wrt the Vietoris topology

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#general-topology #proof-verification #descriptive-set-theory
448
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Lusin spaces: Issues on the definition, and on spaces used in analysis that are not Lusin

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#real-analysis #general-topology #measure-theory #descriptive-set-theory
104
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Is there a perfect Polish topology on the Baire space that is strictly finer than the usual topology?

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#metric-spaces #descriptive-set-theory #the-baire-space
50
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How does $K\notin I$ imply $\lim_{n\rightarrow \infty} \phi(k\backslash [1,n])\neq 0$

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#general-topology #ideals #proof-explanation #descriptive-set-theory
1.1k
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Questions on meager sets

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#general-topology #functional-analysis #descriptive-set-theory
253
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Rasiowa-Sikorski Lemma

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#set-theory #descriptive-set-theory #forcing
354
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What are the Analytic subsets of the Cantor space $\{0,1\}^{\mathbb N}$

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#general-topology #terminology #descriptive-set-theory #cantor-set
117
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Borel set in the Cantor set.

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#descriptive-set-theory
51
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closed function with uncountable set in the domain

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#general-topology #descriptive-set-theory
151
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Family of almost disjoint subsets of $\mathbb{R}_+$ (where non-disjointness is bounded)

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#set-theory #real-numbers #descriptive-set-theory
512
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Cardinal arithmetic in inner models

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#logic #set-theory #descriptive-set-theory #large-cardinals
104
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Reference request: lattice theory of the algebra of open sets in a subspace of the Baire space

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#general-topology #reference-request #lattice-orders #descriptive-set-theory #the-baire-space
1.1k
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Countably generated sigma-algebras

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#measure-theory #set-theory #examples-counterexamples #descriptive-set-theory
241
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$\omega_1$ as seen by the reals

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#set-theory #model-theory #axiom-of-choice #ordinals #descriptive-set-theory

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