User Dominic van der Zypen

13 votes

1 answer

516 views

"Drinking number" of a graph

asked Apr 22, 2021 at 14:50

13 votes

1 answer

283 views

Can any poset of cardinality $\leq 2^{\aleph_0}$ be embedded in ${\cal P}(\omega)/(\text{fin})$?

asked Aug 8, 2023 at 20:23

13 votes

1 answer

943 views

Cantor-Bernstein with "weakly injective" functions

asked Feb 4 at 17:47

13 votes

0 answers

257 views

Is the set of power matrices decidable?

asked Dec 19, 2018 at 10:03

12 votes

1 answer

684 views

Graphs $G$ with $G \cong \text{Aut}(G)$

asked May 21 at 11:49

12 votes

1 answer

296 views

Can the cardinal $2^{\aleph_0}$ be order-embedded in ${\cal P}(\omega)/(\text{fin})$?

asked Feb 20, 2023 at 13:52

12 votes

4 answers

542 views

Optimal schedule for a soccer tournament

asked Apr 23, 2023 at 15:14

12 votes

4 answers

1k views

Are at most $1/3$ vertices "kings"?

asked Feb 28, 2021 at 14:01

12 votes

4 answers

2k views

Throwing a fair die until most recent roll is smaller than previous one

asked Nov 13, 2020 at 10:43

12 votes

2 answers

1k views

Are countable dense subspaces of $\mathbb{R}^n$ homeomorphic to ${\mathbb Q}^n$?

asked Sep 14, 2017 at 5:44

12 votes

3 answers

1k views

Non-isomorphic graphs with bijective graph homomorphisms in both directions between them

asked Sep 4, 2017 at 9:36

12 votes

3 answers

2k views

Minimal Hausdorff

asked Aug 19, 2010 at 15:03

12 votes

1 answer

645 views

Universal maps between topological spaces

asked Nov 19, 2014 at 8:22

11 votes

2 answers

376 views

Multiples in sets of positive upper density

asked Jul 22, 2017 at 8:49

11 votes

1 answer

766 views

Generalized limits on $\ell^\infty(\mathbb{N})$

asked May 17, 2017 at 11:26

11 votes

2 answers

1k views

Meta-undecidability

asked Nov 23, 2016 at 20:19

11 votes

2 answers

388 views

Sum-regular $\{0,1\}$-matrices

asked Mar 16, 2018 at 6:56

11 votes

1 answer

1k views

Order of the "children's card shuffle"

asked May 15 at 7:13

11 votes

1 answer

453 views

Fixed points of injective self-maps

asked Aug 6, 2018 at 5:07

10 votes

3 answers

518 views

Strongly rigid regular graphs

asked Jan 17, 2019 at 13:15

10 votes

0 answers

377 views

Model for "$\kappa$ limit cardinal iff $2^\kappa$ limit cardinal"

asked Jan 23, 2019 at 15:46

10 votes

3 answers

1k views

Is $\mathrm{Graph}$ cartesian-closed?

asked Jan 28, 2019 at 15:21

10 votes

2 answers

240 views

Additive, multiplicative, and Dedekind infiniteness in ${\sf (ZF)}$

asked May 28 at 9:30

10 votes

1 answer

262 views

Does every linear cover contain a minimal cover?

asked Apr 26 at 12:31

10 votes

4 answers

383 views

Universal poset for cardinals $\kappa \geq \aleph_0$

asked Aug 23, 2023 at 9:07

10 votes

2 answers

1k views

Size of maximal intersecting families

asked Oct 10, 2023 at 10:04

10 votes

2 answers

750 views

Universal group such that every finite group is a quotient

asked Nov 15, 2023 at 7:24

10 votes

2 answers

581 views

Maximal Abelian subgroups of $S_\omega$

asked Apr 19, 2023 at 10:25

10 votes

2 answers

270 views

Maximal in-degree in directed voting graph

asked Oct 8, 2020 at 13:46

10 votes

1 answer

2k views

Does the axiom of choice follow from the statement "Every simple undirected graph is either connected, or its complement is connected"?

asked Apr 9, 2018 at 12:23

Stack Exchange Network

1,209 Questions

"Drinking number" of a graph

Can any poset of cardinality $\leq 2^{\aleph_0}$ be embedded in ${\cal P}(\omega)/(\text{fin})$?

Cantor-Bernstein with "weakly injective" functions

Is the set of power matrices decidable?

Graphs $G$ with $G \cong \text{Aut}(G)$

Can the cardinal $2^{\aleph_0}$ be order-embedded in ${\cal P}(\omega)/(\text{fin})$?

Optimal schedule for a soccer tournament

Are at most $1/3$ vertices "kings"?

Throwing a fair die until most recent roll is smaller than previous one

Are countable dense subspaces of $\mathbb{R}^n$ homeomorphic to ${\mathbb Q}^n$?

Non-isomorphic graphs with bijective graph homomorphisms in both directions between them

Minimal Hausdorff

Universal maps between topological spaces

Multiples in sets of positive upper density

Generalized limits on $\ell^\infty(\mathbb{N})$

Meta-undecidability

Sum-regular $\{0,1\}$-matrices

Order of the "children's card shuffle"

Fixed points of injective self-maps

Strongly rigid regular graphs

Model for "$\kappa$ limit cardinal iff $2^\kappa$ limit cardinal"

Is $\mathrm{Graph}$ cartesian-closed?

Additive, multiplicative, and Dedekind infiniteness in ${\sf (ZF)}$

Does every linear cover contain a minimal cover?

Universal poset for cardinals $\kappa \geq \aleph_0$

Size of maximal intersecting families

Universal group such that every finite group is a quotient

Maximal Abelian subgroups of $S_\omega$

Maximal in-degree in directed voting graph

Does the axiom of choice follow from the statement "Every simple undirected graph is either connected, or its complement is connected"?