User Dominic van der Zypen

5 votes

0 answers

472 views

Partitioning $\mathbb{R}^n$ into closed sets

asked Jun 8, 2019 at 5:13

5 votes

1 answer

285 views

Integers with a Hamiltonian Square Path

asked May 25, 2019 at 17:07

5 votes

2 answers

210 views

Slicing up $\mathbb{N}\setminus\{1\}$

asked May 11, 2020 at 18:59

5 votes

0 answers

132 views

Infinite connected $T_2$-space with fixed-cardinality fibers

asked Jan 8, 2020 at 15:58

5 votes

1 answer

367 views

"Intersection number" of a cardinal

asked Jul 16, 2020 at 18:58

5 votes

1 answer

470 views

Is the set of generalized Fermat triples computable?

asked Dec 6 at 7:48

5 votes

3 answers

291 views

The max-clique chromatic number of a graph

asked Dec 2 at 13:31

5 votes

1 answer

157 views

Intersection cardinalities in MAD families

asked Oct 4 at 19:06

5 votes

2 answers

308 views

Majority voting on $\{0,1\}^\mathbb{Z}$

asked Sep 4 at 15:43

5 votes

1 answer

167 views

Cardinality of separating families on an infinite cardinal $\kappa$

asked Aug 9 at 8:08

5 votes

1 answer

344 views

Golomb subsets of $\mathbb{N}$

asked Jun 21 at 13:39

5 votes

1 answer

212 views

Image-catching families in $\omega$

asked Jul 26 at 21:33

5 votes

1 answer

409 views

4-color theorem for hypergraphs

asked Jul 17 at 16:19

4 votes

1 answer

230 views

$\omega\times\omega$-Hadamard matrices

asked Aug 29 at 10:09

4 votes

1 answer

154 views

Minimal dominating sets in thin hypergraphs

asked Sep 24 at 9:20

4 votes

1 answer

190 views

Is the transpose of an infinite Hadamard matrix also Hadamard?

asked Sep 6 at 6:38

4 votes

1 answer

271 views

Maximum density of sum-free sets with respect to Knuth's "addition"

asked 2 days ago

4 votes

2 answers

394 views

Multiplicative and additive groups of the field $(\prod_{n\in\omega}\mathbb{Z}/p_n\mathbb{Z})/\simeq_{\cal U}$

asked Jul 24, 2020 at 7:49

4 votes

1 answer

140 views

Chromatic number of regular linear hypergraphs on $\omega$

asked Jun 16, 2020 at 20:26

4 votes

2 answers

467 views

Is the collection of primitive recursive functions a lower set in the poset of computable functions?

asked Jun 30, 2020 at 6:56

4 votes

0 answers

156 views

Does $\mathbb{R}$ have a partite subbase?

asked May 7, 2020 at 20:26

4 votes

0 answers

124 views

Consistency of an intersection property

asked Aug 7, 2020 at 15:34

4 votes

1 answer

229 views

Map $f:\mathbb{N}\to\mathbb{N}$ such that every 2-set is a neighbor exactly once

asked Aug 3, 2020 at 15:02

4 votes

1 answer

214 views

Embedding any graph in a regular graph with the same chromatic number

asked Aug 18, 2020 at 7:45

4 votes

1 answer

289 views

Does the lattice of partitions map onto the lattice of subsets?

asked Jan 29, 2020 at 9:37

4 votes

1 answer

267 views

Size of finite subset of $\mathbb{N}$ such that the sum of reciprocals is a given positive integer

asked May 27, 2019 at 9:47

4 votes

2 answers

585 views

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

asked Jul 14, 2019 at 15:25

4 votes

1 answer

378 views

Is $(\mathbb{R},+)$ isomorphic to a subgroup of $S_\omega$?

asked Jul 15, 2019 at 11:34

4 votes

0 answers

241 views

Numbers with a square sum arrangement

asked Jul 2, 2019 at 7:02

4 votes

1 answer

160 views

Is sum-balanceability computable?

asked Aug 2, 2019 at 7:01

Stack Exchange Network

1,209 Questions

Partitioning $\mathbb{R}^n$ into closed sets

Integers with a Hamiltonian Square Path

Slicing up $\mathbb{N}\setminus\{1\}$

Infinite connected $T_2$-space with fixed-cardinality fibers

"Intersection number" of a cardinal

Is the set of generalized Fermat triples computable?

The max-clique chromatic number of a graph

Intersection cardinalities in MAD families

Majority voting on $\{0,1\}^\mathbb{Z}$

Cardinality of separating families on an infinite cardinal $\kappa$

Golomb subsets of $\mathbb{N}$

Image-catching families in $\omega$

4-color theorem for hypergraphs

$\omega\times\omega$-Hadamard matrices

Minimal dominating sets in thin hypergraphs

Is the transpose of an infinite Hadamard matrix also Hadamard?

Maximum density of sum-free sets with respect to Knuth's "addition"

Multiplicative and additive groups of the field $(\prod_{n\in\omega}\mathbb{Z}/p_n\mathbb{Z})/\simeq_{\cal U}$

Chromatic number of regular linear hypergraphs on $\omega$

Is the collection of primitive recursive functions a lower set in the poset of computable functions?

Does $\mathbb{R}$ have a partite subbase?

Consistency of an intersection property

Map $f:\mathbb{N}\to\mathbb{N}$ such that every 2-set is a neighbor exactly once

Embedding any graph in a regular graph with the same chromatic number

Does the lattice of partitions map onto the lattice of subsets?

Size of finite subset of $\mathbb{N}$ such that the sum of reciprocals is a given positive integer

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

Is $(\mathbb{R},+)$ isomorphic to a subgroup of $S_\omega$?

Numbers with a square sum arrangement

Is sum-balanceability computable?