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Proof verification: The Cohen algebra of Borel modulo meagre sets is complete.

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#general-topology #set-theory #boolean-algebra #descriptive-set-theory #forcing
81
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Cantor-bendixon and perfect subsets of perfect polish spaces

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#general-topology #set-theory #descriptive-set-theory
275
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How do we find the smallest number of intervals covering the subset of $[0,1]$, if the intervals all have the same length of small $\epsilon$?

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#number-theory #elementary-number-theory #descriptive-set-theory
89
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Does some axiom independent of ZFC (e.g., PD) imply that a correspondence with a projective graph have universally measurable selectors?

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#logic #descriptive-set-theory
81
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Showing a set is Borel

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#functional-analysis #measure-theory #descriptive-set-theory #borel-sets
113
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About Countable union of Baire class 2 functions

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#real-analysis #general-topology #descriptive-set-theory
217
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Another way for partition of perfect set

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#real-analysis #set-theory #axioms #descriptive-set-theory #transfinite-induction
43
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Argument for cardinality of all possible strategies for a two-player game

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#solution-verification #set-theory #descriptive-set-theory #infinite-games
103
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About ZFC and Partition perfect set into perfect sets

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#general-topology #set-theory #axioms #descriptive-set-theory
91
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Second-countable, analytic, completely Baire spaces

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#general-topology #examples-counterexamples #descriptive-set-theory #baire-category #polish-spaces
198
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Cantor space and cantor set

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#general-topology #descriptive-set-theory #cantor-set
109
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Is the leftmost branch function $\text{UB}\rightarrow \omega^\omega$ Borel?

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#set-theory #descriptive-set-theory #borel-sets
336
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About references for Baire class one function and Baire class two function

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#reference-request #set-theory #descriptive-set-theory
198
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Does there exist a Bernstein set such that a finite sum still Bernstein?

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#set-theory #descriptive-set-theory #transfinite-recursion #transfinite-induction
71
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Hints on how to show that $F_2$ is Borel reducible to $F_2|_{B_2}$

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#equivalence-relations #descriptive-set-theory #baire-category

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