User Taras Banakh

5 votes

1 answer

183 views

Which Banach spaces are absolute Lipschitz extensors for compacta?

asked Jan 30, 2018 at 11:53

5 votes

2 answers

266 views

Diophantine equation $x^p+ax=y^p+by$

asked Dec 24, 2017 at 22:15

5 votes

0 answers

214 views

On generically Haar-null sets in the real line

asked Jan 9, 2018 at 21:08

5 votes

0 answers

263 views

Are continuous self-maps of the Golomb space $\mathbb G$ dense in the space of all self-maps of $\mathbb G$?

asked Nov 23, 2017 at 8:00

5 votes

0 answers

138 views

Disjoint covering number of an ideal

asked Nov 16, 2017 at 19:08

5 votes

1 answer

268 views

Is $\mathfrak b_a$ a new cardinal characteristic of the continuum?

asked Jul 1, 2016 at 9:06

5 votes

1 answer

183 views

Which compacta contain copies of Cantor cubes?

asked Dec 28, 2016 at 21:41

5 votes

1 answer

343 views

Large gaps in Singer planar difference sets?

asked Feb 12, 2017 at 23:55

5 votes

1 answer

554 views

Which cyclic groups admit a difference set?

asked Feb 13, 2017 at 23:33

5 votes

0 answers

228 views

What is the smallest number of hyperplanes covering $\ell_2$?

asked Apr 29, 2019 at 20:25

5 votes

0 answers

102 views

Universal and strong $Q$-sets

asked Mar 8, 2019 at 11:42

5 votes

1 answer

341 views

Is each cosmic space cometrizable?

asked Jan 22, 2019 at 18:10

5 votes

1 answer

158 views

What is a name for co-Sobczyk Banach spaces?

asked Jun 6, 2019 at 8:34

5 votes

1 answer

583 views

The Borel class of a countable union of $G_\delta$-sets, which are absolute $F_{\sigma\delta}$

asked Sep 9, 2019 at 10:08

5 votes

1 answer

177 views

An extremal property of points on the unit sphere of a 2-dimensional Banach space

asked Oct 25, 2019 at 21:50

5 votes

2 answers

593 views

Taylor $k$-differentiability of a real function at a point

asked Oct 27, 2019 at 16:39

5 votes

1 answer

524 views

A topologically transitive dynamical system without dense orbits

asked Apr 2, 2020 at 17:23

5 votes

1 answer

356 views

Calculate the $\downarrow$, $\downarrow\uparrow$ and $\uparrow\downarrow$ cofinalities of the poset of nontrivial finitary partitions of $\omega$

asked Feb 18, 2020 at 4:15

5 votes

0 answers

175 views

Selecting an almost disjoint family in a given family of sets

asked Apr 16, 2020 at 20:58

5 votes

1 answer

325 views

Is Axiom of Choice equivalent to its version for families of sets, indexed by ordinals? [duplicate]

asked Apr 23, 2020 at 21:36

5 votes

1 answer

224 views

Absolute summability of multiplication operators on $\ell_p$

asked Nov 18, 2021 at 6:54

5 votes

1 answer

148 views

A perturbation of an unconditionally convergent series in $\ell_2$

asked Nov 1, 2021 at 12:42

5 votes

1 answer

197 views

The largest $\ell_p$-norm of a sum of rows of a Sylvester-Hadamard-Walsh matrix

asked Nov 29, 2021 at 20:41

5 votes

1 answer

358 views

The number of polynomials on a finite group, II

asked Sep 5, 2022 at 6:14

5 votes

2 answers

524 views

A modern reference to the Zsigmondy Theorem

asked Jun 22, 2020 at 10:56

5 votes

0 answers

182 views

Which metrizable spaces can be embedded into the countable power of $\omega$ with the cofinite topology?

asked Jul 25, 2020 at 6:01

5 votes

1 answer

433 views

Integration theory for functions and values with values in topological rings

asked Sep 22, 2020 at 11:08

5 votes

2 answers

200 views

Fast algorithms for calculating the distance between measures on finite ultrametric spaces

asked Sep 23, 2020 at 15:26

5 votes

0 answers

142 views

Two cardinal characteristics of the continuum, related to the Bohr topology on integers

asked Dec 13, 2020 at 16:37

5 votes

2 answers

193 views

A number characterizing the deviation of a triangle from the regular triangle

asked Apr 7, 2021 at 22:39

Stack Exchange Network

351 Questions

Which Banach spaces are absolute Lipschitz extensors for compacta?

Diophantine equation $x^p+ax=y^p+by$

On generically Haar-null sets in the real line

Are continuous self-maps of the Golomb space $\mathbb G$ dense in the space of all self-maps of $\mathbb G$?

Disjoint covering number of an ideal

Is $\mathfrak b_a$ a new cardinal characteristic of the continuum?

Which compacta contain copies of Cantor cubes?

Large gaps in Singer planar difference sets?

Which cyclic groups admit a difference set?

What is the smallest number of hyperplanes covering $\ell_2$?

Universal and strong $Q$-sets

Is each cosmic space cometrizable?

What is a name for co-Sobczyk Banach spaces?

The Borel class of a countable union of $G_\delta$-sets, which are absolute $F_{\sigma\delta}$

An extremal property of points on the unit sphere of a 2-dimensional Banach space

Taylor $k$-differentiability of a real function at a point

A topologically transitive dynamical system without dense orbits

Calculate the $\downarrow$, $\downarrow\uparrow$ and $\uparrow\downarrow$ cofinalities of the poset of nontrivial finitary partitions of $\omega$

Selecting an almost disjoint family in a given family of sets

Is Axiom of Choice equivalent to its version for families of sets, indexed by ordinals? [duplicate]

Absolute summability of multiplication operators on $\ell_p$

A perturbation of an unconditionally convergent series in $\ell_2$

The largest $\ell_p$-norm of a sum of rows of a Sylvester-Hadamard-Walsh matrix

The number of polynomials on a finite group, II

A modern reference to the Zsigmondy Theorem

Which metrizable spaces can be embedded into the countable power of $\omega$ with the cofinite topology?

Integration theory for functions and values with values in topological rings

Fast algorithms for calculating the distance between measures on finite ultrametric spaces

Two cardinal characteristics of the continuum, related to the Bohr topology on integers

A number characterizing the deviation of a triangle from the regular triangle