List questions from descriptive-set-theory

Published on 15 Mar 2014 - 3:24

819

Views

In $\mathbb{R}$, is a countable union of closed no-where dense sets nowhere dense?

Published on 17 Mar 2014 - 1:48

92

Views

Measurability of one set of measures

Published on 18 Mar 2014 - 10:07

125

Views

Measurability of level sets of measures

Published on 21 Mar 2014 - 16:04

513

Views

On Knaster-Kuratowski fan (aka Cantor's teepee)

Published on 22 Mar 2014 - 0:26

233

Views

Boolean Closure and Borel sets

Published on 24 Mar 2014 - 12:12

948

Views

homeomorphism of cantor set extends to the plane?

Published on 25 Mar 2014 - 21:15

106

Views

Maximal pruned subtree - an absolute notion?

Published on 28 Mar 2014 - 16:30

900

Views

Polish topological group

Published on 30 Mar 2014 - 11:42

2.3k

Views

Bijection between closed uncountable subset of $\Bbb R$ and $\Bbb R$.

Published on 04 Apr 2014 - 22:05

120

Views

In how many steps is it necessary to construct the Borel $\sigma$-algebra?

Published on 07 Apr 2014 - 10:53

665

Views

Is there a subset of R such that its Cantor-Bendixson rank is the first limit ordinal?

Published on 20 Apr 2014 - 3:09

34

Views

Can we say that $[0,\omega_1]$ is strictly-Frechet with no winning strategy in $G_{np}(q,E)$?

Published on 20 Apr 2014 - 12:02

279

Views

Continuous image of $\mathbb{R}$ is Borel.

Published on 27 Apr 2014 - 11:09

5.5k

Views

Why do we study Polish spaces?

Published on 01 May 2014 - 5:16

List Question

A Lebesgue measurable universal Borel function

In $\mathbb{R}$, is a countable union of closed no-where dense sets nowhere dense?

Measurability of one set of measures

Measurability of level sets of measures

On Knaster-Kuratowski fan (aka Cantor's teepee)

Boolean Closure and Borel sets

homeomorphism of cantor set extends to the plane?

Maximal pruned subtree - an absolute notion?

Polish topological group

Bijection between closed uncountable subset of $\Bbb R$ and $\Bbb R$.

In how many steps is it necessary to construct the Borel $\sigma$-algebra?

Is there a subset of R such that its Cantor-Bendixson rank is the first limit ordinal?

Can we say that $[0,\omega_1]$ is strictly-Frechet with no winning strategy in $G_{np}(q,E)$?

Continuous image of $\mathbb{R}$ is Borel.

Why do we study Polish spaces?

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