User Dominic van der Zypen

5 votes

1 answer

385 views

Cardinality of connected Hausdorff topologies

asked Apr 17, 2016 at 8:17

5 votes

1 answer

580 views

Does the weak Hadwiger conjecture imply the Hadwiger conjecture?

asked Nov 12, 2014 at 7:22

5 votes

2 answers

913 views

Matching number and chromatic number

asked Aug 13, 2014 at 9:55

5 votes

2 answers

575 views

Anti-compactness

asked Dec 22, 2014 at 8:11

5 votes

1 answer

429 views

A variant to the Hadwiger-Nelson problem

asked Feb 23, 2015 at 8:19

5 votes

2 answers

395 views

Product of "prime" topological spaces

asked Mar 5, 2015 at 7:55

5 votes

3 answers

420 views

Borel coloring of a graph on the set of all functions $f:\mathbb{N}\to\mathbb{N}$

asked May 21, 2015 at 12:18

5 votes

0 answers

171 views

Graphs with no homomorphism and no minor relation

asked Jun 15, 2015 at 7:02

5 votes

3 answers

388 views

Hausdorff space $X$ with $X\cong [X]^2$

asked May 27, 2015 at 9:38

5 votes

1 answer

152 views

Infinite Hausdorff space that is not homeomorphic to any proper quotient

asked Mar 21, 2015 at 11:31

5 votes

1 answer

154 views

Diameter of sum-graph over a non-meager set

asked Apr 8, 2015 at 8:56

5 votes

1 answer

251 views

On a set of sets intersecting in $1$ point

asked Nov 20, 2016 at 13:35

5 votes

2 answers

402 views

Maximal commuting subsets of $\text{End}(X)$

asked Nov 6, 2016 at 13:59

5 votes

2 answers

172 views

Proper coverings as a quotient of the coverings

asked Jan 23, 2017 at 7:50

5 votes

1 answer

166 views

Swappability relation on topological spaces

asked Feb 16, 2017 at 6:50

5 votes

2 answers

528 views

Cardinality of a set of countable connected Hausdorff spaces

asked Sep 11, 2017 at 8:32

5 votes

2 answers

231 views

Squaring a space with the fixed-point property

asked Oct 20, 2017 at 7:49

5 votes

1 answer

305 views

A different ordering on ${\cal P}(\omega)$

asked Oct 23, 2017 at 7:07

5 votes

2 answers

290 views

Are all infinite graphs $3$-weak-edge colorable?

asked Nov 5, 2017 at 7:39

5 votes

2 answers

201 views

Connected $T_2$-space with $\text{Cont}(X,X)$ not dense in $X^X$

asked Nov 23, 2017 at 13:23

5 votes

1 answer

400 views

Homeomorphism-fixing subsets

asked May 22, 2018 at 13:48

5 votes

1 answer

198 views

Is $\mathbb{Q}$ the continuous image of a Golomb-like space, or vice versa?

asked Mar 30, 2018 at 6:04

5 votes

1 answer

531 views

Maximal subgroups not containing a specific element

asked Mar 27, 2018 at 6:31

5 votes

0 answers

94 views

Increasing the Hadwiger number by identifying non-adjacent points

asked Jan 11, 2018 at 9:20

5 votes

1 answer

295 views

Fibonacci grids

asked Feb 7, 2018 at 10:51

5 votes

1 answer

134 views

Decomposing $\{0,1\}^\omega$ endowed with the Sierpinski topology

asked Jun 17, 2022 at 8:35

5 votes

1 answer

370 views

Connected vertex-transitive graph with the fixed-point property

asked Apr 18, 2022 at 18:57

5 votes

1 answer

230 views

Cycling through $\{0,1\}^{(2^n)}$ such that all Hamming distance appear equally frequently

asked Feb 15, 2022 at 16:05

5 votes

2 answers

489 views

Radio-playing sequence

asked Aug 19, 2021 at 13:27

5 votes

1 answer

406 views

Existence of surjection vs injection over $\sf ZF$

asked Jan 1, 2022 at 15:17

Stack Exchange Network

1,209 Questions

Cardinality of connected Hausdorff topologies

Does the weak Hadwiger conjecture imply the Hadwiger conjecture?

Matching number and chromatic number

Anti-compactness

A variant to the Hadwiger-Nelson problem

Product of "prime" topological spaces

Borel coloring of a graph on the set of all functions $f:\mathbb{N}\to\mathbb{N}$

Graphs with no homomorphism and no minor relation

Hausdorff space $X$ with $X\cong [X]^2$

Infinite Hausdorff space that is not homeomorphic to any proper quotient

Diameter of sum-graph over a non-meager set

On a set of sets intersecting in $1$ point

Maximal commuting subsets of $\text{End}(X)$

Proper coverings as a quotient of the coverings

Swappability relation on topological spaces

Cardinality of a set of countable connected Hausdorff spaces

Squaring a space with the fixed-point property

A different ordering on ${\cal P}(\omega)$

Are all infinite graphs $3$-weak-edge colorable?

Connected $T_2$-space with $\text{Cont}(X,X)$ not dense in $X^X$

Homeomorphism-fixing subsets

Is $\mathbb{Q}$ the continuous image of a Golomb-like space, or vice versa?

Maximal subgroups not containing a specific element

Increasing the Hadwiger number by identifying non-adjacent points

Fibonacci grids

Decomposing $\{0,1\}^\omega$ endowed with the Sierpinski topology

Connected vertex-transitive graph with the fixed-point property

Cycling through $\{0,1\}^{(2^n)}$ such that all Hamming distance appear equally frequently

Radio-playing sequence

Existence of surjection vs injection over $\sf ZF$