User Taras Banakh

5 votes

1 answer

155 views

Can the Boolean group $C_2^\omega$ be covered by less than $\mathfrak b$ nowhere dense subgroups?

asked Sep 18, 2021 at 8:43

5 votes

1 answer

197 views

The cardinal characteristic $\mathfrak r_{(X,f)}$ of a dynamical system

asked Oct 5, 2021 at 5:22

5 votes

0 answers

105 views

Is each Lipschitz action of a finite group on the 3-sphere equivalent to a linear action?

asked Mar 24, 2021 at 21:30

5 votes

1 answer

117 views

An isomorphic classification of non-associative division octonion algebras

asked Mar 1 at 12:08

5 votes

5 answers

572 views

Is every uniform hyperbolic linear space infinite?

asked Nov 1, 2023 at 12:25

5 votes

2 answers

199 views

Determining the multiplication via addition and some unary operation

asked May 12 at 23:37

5 votes

1 answer

167 views

What structure is preserved by pseudo-homeomorphisms of pseudo-Euclidean spaces?

asked Apr 20, 2023 at 14:40

5 votes

0 answers

120 views

Is an equilateral triangle constructible in a Tarski plane?

asked Jan 14, 2023 at 9:04

4 votes

0 answers

74 views

Is each TS-topologizable group TG-topologizable?

asked Sep 17, 2022 at 12:06

4 votes

0 answers

72 views

Is each typical map on the $n$-cube strongly rigid?

asked Sep 23, 2022 at 15:12

4 votes

0 answers

182 views

Symmetric line spaces are homeomorphic to Euclidean spaces

asked Mar 28, 2023 at 19:08

4 votes

0 answers

222 views

What does it mean "parallel"?

asked Jul 10, 2023 at 17:44

4 votes

1 answer

684 views

Who and when proved Artin's Theorem on alternative rings?

asked Jun 12 at 18:32

4 votes

0 answers

65 views

A standard name of a strongly extremal point of a convex set

asked Mar 17, 2021 at 8:13

4 votes

1 answer

134 views

The mean value of the reconstruction complexity of a random sequence

asked Oct 20, 2020 at 22:57

4 votes

1 answer

386 views

What does play the role of a subobject classifier for quotient objects?

asked May 25, 2020 at 17:06

4 votes

1 answer

178 views

Categories admitting singleton-classifiers and characterization of the category $\mathbf{Set}$

asked May 27, 2020 at 12:48

4 votes

1 answer

232 views

Is the affine geometry a geometry of proportions?

asked Oct 30, 2022 at 16:31

4 votes

1 answer

194 views

Is every first-countable Lindelof space of cardinality $<\mathfrak c$ a $Q$-space under MA?

asked May 30, 2022 at 6:27

4 votes

0 answers

115 views

Dimension properties of some concrete hereditarily disconnected subspaces of the Hilbert cube

asked Jul 24, 2022 at 6:49

4 votes

1 answer

180 views

What is the smallest cardinality of a maximal ultrafamily of infinite subsets of $\omega$?

asked Apr 15, 2020 at 15:18

4 votes

1 answer

263 views

Does each $\omega$-narrow topological group have countable discrete cellularity?

asked Mar 19, 2019 at 22:15

4 votes

1 answer

223 views

K-analytic spaces whose any compact subset is countable

asked Apr 15, 2019 at 7:18

4 votes

1 answer

396 views

Is there a universally meager air space?

asked May 18, 2019 at 8:44

4 votes

0 answers

105 views

Borel selections of usco maps on metrizable compacta

asked May 3, 2019 at 7:41

4 votes

0 answers

318 views

Prime powers between $x$ and $x+x^\theta$

asked Feb 14, 2017 at 5:55

4 votes

1 answer

257 views

Does every finite abelian $p$-group $G$ admit a local ring structure with residue field of the same rank as $G$?

asked Mar 24, 2017 at 21:17

4 votes

0 answers

229 views

Do $G_\delta$-measurable maps preserve dimension?

asked Jun 1, 2016 at 15:58

4 votes

1 answer

133 views

Hurewicz versus Wadge hierarchy of zero-dimensional Borel sets?

asked Oct 27, 2015 at 10:46

4 votes

1 answer

157 views

Difference bases in simple cyclic groups

asked Mar 8, 2017 at 13:59

Stack Exchange Network

351 Questions

Can the Boolean group $C_2^\omega$ be covered by less than $\mathfrak b$ nowhere dense subgroups?

The cardinal characteristic $\mathfrak r_{(X,f)}$ of a dynamical system

Is each Lipschitz action of a finite group on the 3-sphere equivalent to a linear action?

An isomorphic classification of non-associative division octonion algebras

Is every uniform hyperbolic linear space infinite?

Determining the multiplication via addition and some unary operation

What structure is preserved by pseudo-homeomorphisms of pseudo-Euclidean spaces?

Is an equilateral triangle constructible in a Tarski plane?

Is each TS-topologizable group TG-topologizable?

Is each typical map on the $n$-cube strongly rigid?

Symmetric line spaces are homeomorphic to Euclidean spaces

What does it mean "parallel"?

Who and when proved Artin's Theorem on alternative rings?

A standard name of a strongly extremal point of a convex set

The mean value of the reconstruction complexity of a random sequence

What does play the role of a subobject classifier for quotient objects?

Categories admitting singleton-classifiers and characterization of the category $\mathbf{Set}$

Is the affine geometry a geometry of proportions?

Is every first-countable Lindelof space of cardinality $<\mathfrak c$ a $Q$-space under MA?

Dimension properties of some concrete hereditarily disconnected subspaces of the Hilbert cube

What is the smallest cardinality of a maximal ultrafamily of infinite subsets of $\omega$?

Does each $\omega$-narrow topological group have countable discrete cellularity?

K-analytic spaces whose any compact subset is countable

Is there a universally meager air space?

Borel selections of usco maps on metrizable compacta

Prime powers between $x$ and $x+x^\theta$

Does every finite abelian $p$-group $G$ admit a local ring structure with residue field of the same rank as $G$?

Do $G_\delta$-measurable maps preserve dimension?

Hurewicz versus Wadge hierarchy of zero-dimensional Borel sets?

Difference bases in simple cyclic groups