List questions from descriptive-set-theory | MathQA

Question on Gale-Stewart Theorem and Axiom of Choice

Published on 23 Feb 2026 - 15:09

How to prove these definitions of an analytic set are equivalent?

Published on 23 Feb 2026 - 12:05

If a metric space $F$ is Borel isomorphic to a Lusin measurable space, then $F$ must be homeomorphic to a Borel subset of some compact metric space

Published on 30 Oct 2022 - 16:01

Descriptive Set Theory - definable sets can be partitioned into more pieces than elements of original set

Published on 31 Oct 2022 - 18:09

Explicitly constructing a non determined game on $\mathcal{P}(2^{\mathbb{N}})$

Published on 02 Nov 2022 - 18:40

Hyperreals and Suslin problem

Published on 25 Mar 2026 - 23:34

Countable dense subset of Cantor space isn't Wadge reducible to its complement

Published on 29 Mar 2026 - 15:02

Locus of Continuity of a Function between Polish Spaces

Published on 23 Feb 2026 - 13:47

A generalization of Mostowski absoluteness theorem

Published on 19 Jan 2023 - 18:34

G separable group, $\aleph_0 \leq \tau$. What is $l(X)$ and $\omega l(X) (\leq \tau)$? where $X \subseteq G$. And what is $\chi (G)$ (cardinal)?

Published on 22 Jan 2023 - 5:38