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Prove $C$ and $S$ are $\Sigma^1_1$ and $\Pi^1_1$ respectively.

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#general-topology #set-theory #cardinals #descriptive-set-theory
39
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Borel space of dynamical subsystems

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#dynamical-systems #descriptive-set-theory
70
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Incomparable Cardinal Invariants of the Continuum

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#set-theory #descriptive-set-theory #forcing
62
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On Power Set of Naturals and Cantor Space

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#general-topology #elementary-set-theory #descriptive-set-theory
64
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Is taking fibers continuous?

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#general-topology #descriptive-set-theory
188
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Open subset of a polish space

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#general-topology #descriptive-set-theory
190
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Why is this function, used to show that finite Borel relations are smooth, Borel?

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#equivalence-relations #descriptive-set-theory #borel-sets
114
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Every point of a perfect set in complete metric space is condensation point

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#general-topology #set-theory #descriptive-set-theory
183
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property of Baire and Borel sets

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#general-topology #descriptive-set-theory #borel-sets
80
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$f: X\rightarrow Y$ s.t. $f^{-1}(\boldsymbol{\Sigma_3^0})\subseteq\boldsymbol{\Sigma_2^0}$

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#general-topology #descriptive-set-theory #borel-sets
130
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In an uncountable Polish space there is no countably generated $\sigma$-algebra between analytic sets and sets with the Baire property

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#descriptive-set-theory #borel-sets #baire-category
177
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Not quite cardinal characteristics of the continuum

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#general-topology #measure-theory #logic #set-theory #descriptive-set-theory
92
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Presentation on game theory and determinacy

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#reference-request #game-theory #advice #descriptive-set-theory #infinite-games
54
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Wijsman topology

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#general-topology #functional-analysis #descriptive-set-theory
122
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Borel isomorphisms between perfect Polish spaces and their "rank"

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#set-theory #descriptive-set-theory #borel-sets #polish-spaces

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