User Taras Banakh

51 votes

3 answers

3k views

Is each squared finite group trivial?

asked Feb 18, 2021 at 8:05

47 votes

3 answers

3k views

A metric characterization of the real line

asked Mar 15, 2023 at 13:47

43 votes

0 answers

819 views

A kaleidoscopic coloring of the plane

asked Oct 2, 2015 at 18:55

34 votes

2 answers

2k views

Are the Sierpiński cardinal $\acute{\mathfrak n}$ and its measure modification $\acute{\mathfrak m}$ equal to some known small uncountable cardinals?

asked Nov 11, 2017 at 10:48

29 votes

1 answer

1k views

Is the Golomb countable connected space topologically rigid?

asked Nov 8, 2017 at 16:41

28 votes

8 answers

6k views

Mathematical journals that accept long papers (up to 100 pages)

asked Feb 8, 2022 at 8:47

25 votes

2 answers

1k views

The number of polynomials on a finite group

asked Sep 2, 2022 at 6:04

24 votes

3 answers

3k views

How to find a conformal map of the unit disk on a given simply-connected domain

asked Oct 30, 2018 at 17:44

20 votes

2 answers

729 views

Multiple roots of polynomials with coefficients $\pm 1$

asked Jun 10, 2022 at 7:48

19 votes

6 answers

1k views

Almost squared finite groups

asked Feb 20, 2021 at 18:20

19 votes

1 answer

465 views

Large Borel antichains in the Cantor cube?

asked Dec 17, 2016 at 10:05

18 votes

1 answer

425 views

Partitions of the real line into Borel subsets

asked May 11, 2021 at 20:42

17 votes

1 answer

429 views

Axiom of Countable Choice and meager sets

asked Sep 13, 2020 at 6:24

17 votes

1 answer

1k views

Has the exponentiation of ordinals a nice geometric model?

asked Apr 24, 2020 at 19:58

17 votes

1 answer

794 views

Is there a continuous function $f:\mathbb R^\omega\to\mathbb R$ with injective restriction $f|\mathbb Q^\omega$?

asked Sep 2, 2017 at 21:50

17 votes

3 answers

1k views

A Shelah group in ZFC?

asked Oct 22, 2018 at 23:46

16 votes

2 answers

731 views

A reference to a characterization of metric spaces admitting an isometric embedding into a Hilbert space

asked Apr 12, 2018 at 7:27

16 votes

0 answers

372 views

On projectively countable sets in the Hilbert cube

asked Apr 29, 2019 at 5:19

16 votes

1 answer

618 views

A textbook on foundations of geometry in spirit of Tarski

asked Oct 16, 2022 at 18:54

16 votes

1 answer

783 views

Who first proved that algebraic numbers form an algebraically closed field?

asked Mar 31, 2023 at 8:43

16 votes

1 answer

2k views

A contradiction in the Set Theory of von Neumann–Bernays–Gödel?

asked Apr 8, 2023 at 10:41

15 votes

0 answers

409 views

Is there a continuous map $f:\mathbb R^\omega\to\mathbb R^\omega$ with dense countable preimage $f^{-1}(\mathbb Q^\omega)$?

asked Sep 3, 2017 at 9:22

15 votes

1 answer

417 views

What is the smallest cardinality of a self-linked set in a finite cyclic group?

asked Feb 15, 2017 at 19:46

14 votes

1 answer

523 views

Is Bing's countable connected space topologically homogeneous?

asked Nov 18, 2017 at 6:38

14 votes

1 answer

295 views

Is $Alt_\omega$ a dense subgroup of a non-discrete locally compact topological group?

asked Feb 22, 2018 at 17:24

14 votes

2 answers

400 views

A finite group that has no decomposition of given cardinality

asked Nov 25, 2018 at 1:16

14 votes

1 answer

581 views

How flexible is the infinite-dimensional torus?

asked Feb 13, 2020 at 6:01

13 votes

1 answer

669 views

Topological groups containing the Sorgenfrey line

asked Jan 16, 2019 at 20:43

13 votes

1 answer

442 views

Is the identity function a unique multiplicative homeomorphism of $\mathbb N$?

asked Sep 8, 2018 at 20:25

13 votes

1 answer

3k views

A good reference to the general Chinese Remainder Theorem

asked Nov 21, 2017 at 10:55

Stack Exchange Network

351 Questions

Is each squared finite group trivial?

A metric characterization of the real line

A kaleidoscopic coloring of the plane

Are the Sierpiński cardinal $\acute{\mathfrak n}$ and its measure modification $\acute{\mathfrak m}$ equal to some known small uncountable cardinals?

Is the Golomb countable connected space topologically rigid?

Mathematical journals that accept long papers (up to 100 pages)

The number of polynomials on a finite group

How to find a conformal map of the unit disk on a given simply-connected domain

Multiple roots of polynomials with coefficients $\pm 1$

Almost squared finite groups

Large Borel antichains in the Cantor cube?

Partitions of the real line into Borel subsets

Axiom of Countable Choice and meager sets

Has the exponentiation of ordinals a nice geometric model?

Is there a continuous function $f:\mathbb R^\omega\to\mathbb R$ with injective restriction $f|\mathbb Q^\omega$?

A Shelah group in ZFC?

A reference to a characterization of metric spaces admitting an isometric embedding into a Hilbert space

On projectively countable sets in the Hilbert cube

A textbook on foundations of geometry in spirit of Tarski

Who first proved that algebraic numbers form an algebraically closed field?

A contradiction in the Set Theory of von Neumann–Bernays–Gödel?

Is there a continuous map $f:\mathbb R^\omega\to\mathbb R^\omega$ with dense countable preimage $f^{-1}(\mathbb Q^\omega)$?

What is the smallest cardinality of a self-linked set in a finite cyclic group?

Is Bing's countable connected space topologically homogeneous?

Is $Alt_\omega$ a dense subgroup of a non-discrete locally compact topological group?

A finite group that has no decomposition of given cardinality

How flexible is the infinite-dimensional torus?

Topological groups containing the Sorgenfrey line

Is the identity function a unique multiplicative homeomorphism of $\mathbb N$?

A good reference to the general Chinese Remainder Theorem