User Dominic van der Zypen

1 vote

1 answer

121 views

Infinite connected graphs isomorphic to their line graph

asked Jul 6, 2018 at 5:14

1 vote

2 answers

213 views

Bipartite subgraphs with lots of edges

asked Jul 21, 2018 at 18:15

1 vote

1 answer

80 views

Minimally connected hypergraphs

asked Dec 5, 2019 at 13:31

1 vote

2 answers

163 views

Clutters with no maximum-size matchings

asked Nov 13, 2019 at 12:08

1 vote

1 answer

363 views

Examples of "irregularities" in mathematics, other than prime numbers [closed]

asked Dec 22, 2019 at 8:20

1 vote

1 answer

190 views

Subset of $[\omega]^\omega$ that can be "colored" with $3$, but not $2$ colors

asked Jan 6, 2020 at 15:28

1 vote

1 answer

102 views

Are non-trivial interval-isomorphic posets lattices?

asked Sep 4, 2019 at 7:59

1 vote

1 answer

192 views

$\mathbb{R}$-like spaces [closed]

asked Oct 7, 2019 at 20:55

1 vote

0 answers

392 views

Magical $\mathbb{Z}\times\mathbb{Z}$-square [duplicate]

asked Oct 14, 2019 at 9:11

1 vote

1 answer

194 views

Does the Kimberling sequence map numbers "arbitrarily far away"?

asked Oct 24, 2019 at 11:42

1 vote

1 answer

62 views

Induced subgraphs of the line graph of a dense linear hypergraph

asked Aug 14, 2019 at 9:10

1 vote

1 answer

338 views

Number of prime factors and density

asked Aug 21, 2019 at 11:26

1 vote

1 answer

58 views

Regularization of arbitrary graphs

asked May 22, 2019 at 6:37

1 vote

2 answers

277 views

Size of intersecting families on $\{1,\ldots,n\}$

asked Apr 22, 2019 at 15:33

1 vote

0 answers

50 views

Minimizing the set of multiply covered elements in a linear hypergraph

asked Jun 3, 2019 at 11:45

1 vote

1 answer

175 views

Density of the set of numbers that are "good approximators" to a given real in the sense of Dirichlet's approximation theorem

asked Dec 17, 2019 at 9:03

1 vote

0 answers

41 views

Contraction criticality and edge-adding criticality for Hadwiger number

asked Mar 3, 2020 at 10:25

1 vote

1 answer

105 views

Bounding and dominating numbers for preordering $\leq^*$ on bijections $f:\omega\to\omega$

asked Feb 14, 2020 at 15:29

1 vote

1 answer

203 views

Effect of removing an edge on Hadwiger number

asked Feb 17, 2020 at 7:01

1 vote

1 answer

141 views

Coloring $\mathbb{N}$ such that $\{a, b, a+b\}$ is not monochromatic

asked Feb 19, 2020 at 9:44

1 vote

1 answer

96 views

Infinite directed paths in tournaments on $\omega$

asked Jan 30, 2020 at 9:49

1 vote

0 answers

38 views

Hadwiger number in vertex collapse in a bipartite graph

asked Jan 31, 2020 at 13:46

1 vote

0 answers

58 views

Partitionability and colorability of hypergraphs

asked Feb 3, 2020 at 7:20

1 vote

1 answer

140 views

Thinning directed sets ${\frak P}$ of partitions of $\omega$ with no ${\frak P}$-discrete subsets

asked Feb 10, 2020 at 7:48

1 vote

2 answers

176 views

Connected Hausdorff spaces with large collection of disjoint open sets

asked Apr 25, 2020 at 18:26

1 vote

1 answer

193 views

A converse of the Erdős-De Bruijn Theorem?

asked Mar 14, 2020 at 7:27

1 vote

1 answer

193 views

Bike lock graph

asked Apr 6, 2020 at 12:41

1 vote

2 answers

214 views

Hedetniemi for pseudo-chromatic number $\psi(G)$

asked Aug 6, 2020 at 12:46

1 vote

0 answers

63 views

$1$-factorizability for linear hypergraphs with infinite edges on $\omega$

asked Sep 1, 2020 at 10:44

1 vote

1 answer

36 views

Chromatic self-maps on finite complete linear hypergraphs

asked Jun 6, 2020 at 11:11

Stack Exchange Network

1,211 Questions

Infinite connected graphs isomorphic to their line graph

Bipartite subgraphs with lots of edges

Minimally connected hypergraphs

Clutters with no maximum-size matchings

Examples of "irregularities" in mathematics, other than prime numbers [closed]

Subset of $[\omega]^\omega$ that can be "colored" with $3$, but not $2$ colors

Are non-trivial interval-isomorphic posets lattices?

$\mathbb{R}$-like spaces [closed]

Magical $\mathbb{Z}\times\mathbb{Z}$-square [duplicate]

Does the Kimberling sequence map numbers "arbitrarily far away"?

Induced subgraphs of the line graph of a dense linear hypergraph

Number of prime factors and density

Regularization of arbitrary graphs

Size of intersecting families on $\{1,\ldots,n\}$

Minimizing the set of multiply covered elements in a linear hypergraph

Density of the set of numbers that are "good approximators" to a given real in the sense of Dirichlet's approximation theorem

Contraction criticality and edge-adding criticality for Hadwiger number

Bounding and dominating numbers for preordering $\leq^*$ on bijections $f:\omega\to\omega$

Effect of removing an edge on Hadwiger number

Coloring $\mathbb{N}$ such that $\{a, b, a+b\}$ is not monochromatic

Infinite directed paths in tournaments on $\omega$

Hadwiger number in vertex collapse in a bipartite graph

Partitionability and colorability of hypergraphs

Thinning directed sets ${\frak P}$ of partitions of $\omega$ with no ${\frak P}$-discrete subsets

Connected Hausdorff spaces with large collection of disjoint open sets

A converse of the Erdős-De Bruijn Theorem?

Bike lock graph

Hedetniemi for pseudo-chromatic number $\psi(G)$

$1$-factorizability for linear hypergraphs with infinite edges on $\omega$

Chromatic self-maps on finite complete linear hypergraphs