User Martin Sleziak

31 votes

Can the supremum of continuous functions be discontinuous at every point of an interval?

answered Sep 1, 2018 at 0:31

29 votes

Accepted

Dual space of $\ell^\infty$

answered Mar 22, 2011 at 11:26

23 votes

Accepted

A good reference to the general Chinese Remainder Theorem

answered Nov 21, 2017 at 12:01

19 votes

Accepted

Arranging all permutations on $\{1,\ldots,n\}$ such that there are no common points

answered May 29, 2019 at 15:23

19 votes

Accepted

"Rocket elements" in bijections $f:\mathbb{N}\to \mathbb{N}$

answered Jul 14, 2019 at 15:45

12 votes

Accepted

Density of a set of natural numbers whose differences are not bounded.

answered May 27, 2011 at 15:15

12 votes

BCT equivalent to DC

answered Oct 3, 2020 at 13:00

11 votes

Accepted

Density-$c_0$ in $\ell^\infty$

answered Oct 30, 2018 at 10:53

9 votes

Accepted

Is the Rudin-Keisler order of ultrafilters linear?

answered Feb 27, 2011 at 14:43

9 votes

Accepted

Do multiplicative Banach limits exist?

answered Apr 7, 2020 at 7:06

8 votes

Accepted

Ref. request: Additive probability measure on $\mathcal P({\bf N})$ supplies subset of $\mathbf R$ without Baire property

answered Jun 12, 2015 at 11:24

7 votes

Accepted

Where to find the results of Onishchik?

answered May 11, 2018 at 13:01

7 votes

Accepted

Copy of paper by M. Naimi on squarefree friable integers

answered Oct 11, 2021 at 14:09

6 votes

Accepted

$n$-product-periodic topological spaces

answered Feb 24, 2019 at 8:34

6 votes

Accepted

MAD family with the choosability property

answered Jun 7, 2022 at 11:27

6 votes

Accepted

Reference on the countable product of Banach spaces

answered Aug 31, 2016 at 12:26

6 votes

Pseudonyms of famous mathematicians

answered Jul 9, 2011 at 17:10

5 votes

What are good English-language sources for reading about the Luzin affair?

answered Oct 15, 2013 at 4:59

5 votes

Accepted

Reference or counter-example for Closed Graph Theorem for multivalued maps in general topological spaces

answered Jun 19, 2016 at 6:44

5 votes

Accepted

Bounding and domination numbers for relation $\leq$ modulo $\omega$-nullsets

answered Feb 11, 2020 at 8:48

5 votes

Accepted

Magic $\mathbb{Z}\times\mathbb{Z}$-square

answered Oct 17, 2019 at 16:26

4 votes

Is there a Borel-measurable function which maps every interval onto $\mathbb R$?

answered Nov 30, 2019 at 15:49

4 votes

Accepted

Existence of a Borel measurable function below any positive function

answered Jul 7, 2016 at 12:59

4 votes

Accepted

Do monotone functions on the interval have an "Alexander duality" property?

answered Jun 14, 2017 at 18:37

4 votes

Accepted

Meeting a set of lines in $\mathbb{R}^n$

answered Aug 7, 2017 at 8:11

4 votes

Accepted

What is a generalized limit?

answered Jun 15, 2016 at 20:07

4 votes

Accepted

Unicity of additive, $(-1)$-homogeneous, and shift invariant probability measures on $\mathbf N^+$

answered Jun 19, 2015 at 22:12

4 votes

Accepted

Existence of maximal analytic P-ideal

answered May 27, 2017 at 7:56

4 votes

Applications of connectedness

answered Jun 1, 2017 at 10:39

4 votes

Articles with examples of Darboux functions without fixed points

answered Sep 16, 2013 at 10:20

Stack Exchange Network

52 Answers

Can the supremum of continuous functions be discontinuous at every point of an interval?

Dual space of $\ell^\infty$

A good reference to the general Chinese Remainder Theorem

Arranging all permutations on $\{1,\ldots,n\}$ such that there are no common points

"Rocket elements" in bijections $f:\mathbb{N}\to \mathbb{N}$

Density of a set of natural numbers whose differences are not bounded.

BCT equivalent to DC

Density-$c_0$ in $\ell^\infty$

Is the Rudin-Keisler order of ultrafilters linear?

Do multiplicative Banach limits exist?

Ref. request: Additive probability measure on $\mathcal P({\bf N})$ supplies subset of $\mathbf R$ without Baire property

Where to find the results of Onishchik?

Copy of paper by M. Naimi on squarefree friable integers

$n$-product-periodic topological spaces

MAD family with the choosability property

Reference on the countable product of Banach spaces

Pseudonyms of famous mathematicians

What are good English-language sources for reading about the Luzin affair?

Reference or counter-example for Closed Graph Theorem for multivalued maps in general topological spaces

Bounding and domination numbers for relation $\leq$ modulo $\omega$-nullsets

Magic $\mathbb{Z}\times\mathbb{Z}$-square

Is there a Borel-measurable function which maps every interval onto $\mathbb R$?

Existence of a Borel measurable function below any positive function

Do monotone functions on the interval have an "Alexander duality" property?

Meeting a set of lines in $\mathbb{R}^n$

What is a generalized limit?

Unicity of additive, $(-1)$-homogeneous, and shift invariant probability measures on $\mathbf N^+$

Existence of maximal analytic P-ideal

Applications of connectedness

Articles with examples of Darboux functions without fixed points