Martin Sleziak's user avatar
Martin Sleziak's user avatar
Martin Sleziak's user avatar
Martin Sleziak
  • Member for 13 years, 7 months
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29 votes

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

27 votes
Accepted

Dual space of $\ell^\infty$

23 votes
Accepted

A good reference to the general Chinese Remainder Theorem

19 votes
Accepted

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

19 votes
Accepted

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

12 votes
Accepted

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

11 votes
Accepted

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

11 votes

BCT equivalent to DC

10 votes
Accepted

Is the Rudin-Keisler order of ultrafilters linear?

9 votes
Accepted

Do multiplicative Banach limits exist?

8 votes
Accepted

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

7 votes
Accepted

Where to find the results of Onishchik?

6 votes
Accepted

Reference on the countable product of Banach spaces

6 votes

Pseudonyms of famous mathematicians

6 votes
Accepted

Copy of paper by M. Naimi on squarefree friable integers

6 votes
Accepted

$n$-product-periodic topological spaces

6 votes
Accepted

MAD family with the choosability property

5 votes
Accepted

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

5 votes
Accepted

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

5 votes

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

5 votes
Accepted

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

4 votes
Accepted

Existence of a Borel measurable function below any positive function

4 votes
Accepted

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

4 votes
Accepted

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

4 votes
Accepted

What is a generalized limit?

4 votes
Accepted

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

4 votes
Accepted

Existence of maximal analytic P-ideal

4 votes

Applications of connectedness

4 votes

Articles with examples of Darboux functions without fixed points

4 votes

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