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Alexander Osipov's user avatar
Alexander Osipov's user avatar
Alexander Osipov's user avatar
Alexander Osipov
  • Member for 7 years, 4 months
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question
10
Is there a model of set theory in which $\mathfrak p< \mathfrak b < \mathfrak q$?
May 26, 2018
question
9
Is there a condensation from $\aleph_1^{\aleph_0}$ onto a metrizable compact space?
Jun 13, 2020
question
7
Are σ-sets preserved by Borel isomorphisms?
Aug 6, 2017
question
7
What is an example of a meager space X such that X is concentrated on countable dense set?
May 27, 2022
question
6
Is there a Bernstein subset $X$ of $\mathbb{R}$ such that no continuous map $f : X → [0,1]$ is surjective?
Mar 13
question
5
Is it true that $\mathit{MA}(\omega_1)$ iff $\omega_1<\mathfrak{p}$?
Jan 15, 2023
question
4
Hedgehog of spininess $κ$ is an absolute retract?
Mar 27, 2022
question
4
Are there such a complete metric space X of weight k (w(X)=k) and ....?
Apr 4, 2022
question
4
Is there a condensation of a closed subset of $\kappa^\omega$ onto $\kappa^\omega\setminus A$ …?
Sep 17, 2022
question
4
An uncountable Baire γ-space without an isolated point exists?
Dec 25, 2022