Question

non-Lebesgue-measurable subsets of Smith-Volterra-Cantor sets

score 230 · Answer 1 · 2013-03-29 08:33:27

230

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non-Lebesgue-measurable subsets of Smith-Volterra-Cantor sets

Published on 29 Mar 2013 - 8:33

score 648 · Answer 2 · 2020-08-16 10:08:53

648

Views

Borel sets versus Baire sets

Published on 16 Aug 2020 - 10:08

score 120 · Answer 3 · 2020-08-24 16:55:44

120

Views

Complexity of partitions of $\mathbb{R}$ into subsemigroups

Published on 24 Aug 2020 - 16:55

score 126 · Answer 4 · 2020-09-02 14:13:53

126

Views

Invertible Borel set preserved mapping between $\times_{n \in \mathbb{N}} \mathbb{C}$ and $[0, 1]$

Published on 02 Sep 2020 - 14:13

score 477 · Answer 5 · 2020-09-04 22:21:14

477

Views

Are Borel subsets of Polish spaces Polish?

Published on 04 Sep 2020 - 22:21

score 233 · Answer 6 · 2026-02-23 08:26:46

233

Views

Equivalent formulations of analytic/ $\omega$-suslin sets (in Baire Space)

Published on 23 Feb 2026 - 8:26

score 139 · Answer 7 · 2026-02-23 08:24:57

139

Views

Recursive representation of closed sets in Baire Space ($\Sigma^1_1$)

Published on 23 Feb 2026 - 8:24

score 419 · Answer 8 · 2020-09-11 01:59:29

419

Views

Cardinality of the collection of measurable subsets of metric outer measures

Published on 11 Sep 2020 - 1:59

score 171 · Answer 9 · 2020-09-12 02:15:57

171

Views

How to prove that $\mathbb{Q}$ is not the intersection of a countable collection of open sets WITHOUT Baire's Category Theorem.

Published on 12 Sep 2020 - 2:15

score 116 · Answer 10 · 2020-09-14 10:19:54

116

Views

A rather non-$F_\sigma$ Borel set

Published on 14 Sep 2020 - 10:19

score 319 · Answer 11 · 2020-09-17 11:36:30

319

Views

Show that the Borel Hierarchy on $\mathbb{R}$ doesn't end at the first infinite ordinal?

Published on 17 Sep 2020 - 11:36

score 281 · Answer 12 · 2020-09-21 10:26:11

281

Views

$\exists$ countably generated $\mathcal F$, s.t. $\sigma(\{ \{\omega \}: \omega\in\Omega \}) \subsetneqq \mathcal F \subsetneqq \mathcal B(\Omega)$?

Published on 21 Sep 2020 - 10:26

score 45 · Answer 13 · 2026-02-23 06:37:51

45

Views

Perfect Kernel analogue for NON $\sigma-$compact subsets of a Polish space

Published on 23 Feb 2026 - 6:37

score 258 · Answer 14 · 2020-09-26 21:39:50

258

Views

Absoluteness of $\Sigma^1_1$ sets (in transitive proper class models of ZFC)

Published on 26 Sep 2020 - 21:39

score 123 · Answer 15 · 2020-09-29 03:53:29

123

Views

What an example of tree on descriptive set theory?

Published on 29 Sep 2020 - 3:53

List Question

non-Lebesgue-measurable subsets of Smith-Volterra-Cantor sets

Borel sets versus Baire sets

Complexity of partitions of $\mathbb{R}$ into subsemigroups

Invertible Borel set preserved mapping between $\times_{n \in \mathbb{N}} \mathbb{C}$ and $[0, 1]$

Are Borel subsets of Polish spaces Polish?

Equivalent formulations of analytic/ $\omega$-suslin sets (in Baire Space)

Recursive representation of closed sets in Baire Space ($\Sigma^1_1$)

Cardinality of the collection of measurable subsets of metric outer measures

How to prove that $\mathbb{Q}$ is not the intersection of a countable collection of open sets WITHOUT Baire's Category Theorem.

A rather non-$F_\sigma$ Borel set

Show that the Borel Hierarchy on $\mathbb{R}$ doesn't end at the first infinite ordinal?

$\exists$ countably generated $\mathcal F$, s.t. $\sigma(\{ \{\omega \}: \omega\in\Omega \}) \subsetneqq \mathcal F \subsetneqq \mathcal B(\Omega)$?

Perfect Kernel analogue for NON $\sigma-$compact subsets of a Polish space

Absoluteness of $\Sigma^1_1$ sets (in transitive proper class models of ZFC)

What an example of tree on descriptive set theory?

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