User Dominic van der Zypen

4 votes

1 answer

325 views

Maximality without Zorn

asked Oct 19, 2017 at 9:41

4 votes

1 answer

153 views

Posets as graphs with the direct neighbor relation

asked Oct 11, 2017 at 14:05

4 votes

1 answer

427 views

"Compactness" theorem for the coloring number

asked Nov 1, 2017 at 13:47

4 votes

1 answer

178 views

"Gaps" in the Rudin-Keisler ordering

asked Nov 2, 2017 at 6:35

4 votes

0 answers

435 views

Can infinite bounded distibutive lattices be "arbitrarily wide"?

asked Oct 7, 2017 at 13:39

4 votes

1 answer

393 views

Refining topologies to make them Hausdorff

asked Sep 21, 2017 at 5:48

4 votes

1 answer

101 views

Spaces that are invariant under some contractions

asked Aug 6, 2017 at 15:29

4 votes

1 answer

181 views

Cardinality of a set of pairwise non-order-isomorphic ultrafilters on $\omega$

asked Jul 19, 2017 at 13:51

4 votes

0 answers

116 views

Infinite $3$-chromatic hypergraphs

asked Jul 9, 2017 at 15:40

4 votes

0 answers

153 views

Maximality with respect to having no marriage

asked Jun 2, 2017 at 9:10

4 votes

1 answer

262 views

Greedy coloring for infinite graphs

asked Mar 1, 2017 at 8:51

4 votes

0 answers

152 views

Interval topology of the poset of all coverings

asked Jan 16, 2017 at 13:32

4 votes

1 answer

184 views

Intersection number of infinite graphs

asked Mar 15, 2017 at 7:26

4 votes

1 answer

368 views

$\mathbb{R}$ and the order-convergence topology

asked Jan 27, 2017 at 8:29

4 votes

1 answer

131 views

Image spaces of $X^2$

asked Aug 15, 2016 at 7:51

4 votes

3 answers

256 views

Commuting functions and fixpoints

asked Dec 27, 2016 at 14:42

4 votes

3 answers

325 views

A graph consisting of cliques pairwise intersecting in 1 point

asked Nov 7, 2016 at 13:38

4 votes

0 answers

276 views

Quasi-disjoint subsets of an infinite set and $\neg \mathsf{AC}$

asked Mar 3, 2015 at 14:27

4 votes

0 answers

140 views

$\kappa$-impediments (according to Shelah, Nash-Williams, Aharoni)

asked Mar 13, 2015 at 10:53

4 votes

3 answers

531 views

Antichain on $\mathcal{P}(\omega)/fin$ of cardinality $2^{\aleph_0}$?

asked Mar 23, 2015 at 8:21

4 votes

1 answer

299 views

Chromatic number of graph defined on the set of permutations

asked Jun 5, 2015 at 6:53

4 votes

1 answer

285 views

Regular epimorphisms in the category of simple undirected graphs

asked May 12, 2015 at 8:21

4 votes

0 answers

134 views

Linear intersection number and coloring (not chromatic) number

asked Mar 5, 2015 at 10:27

4 votes

3 answers

183 views

Existence of injective neighborhood selection function as separation axiom

asked Mar 10, 2015 at 10:16

4 votes

1 answer

148 views

Countable hypo-hamiltonian graph

asked Feb 20, 2015 at 12:26

4 votes

1 answer

245 views

Strongly minimal covers

asked Jan 7, 2015 at 9:59

4 votes

2 answers

225 views

Image of poset with Hausdorff interval topology

asked Jan 23, 2015 at 9:30

4 votes

1 answer

315 views

Constructing a function from preimages

asked Sep 10, 2014 at 9:18

4 votes

1 answer

235 views

What can be said about graphs if there are homomorphisms in both directions?

asked Dec 1, 2014 at 11:32

4 votes

0 answers

98 views

Unique representability of bounded distributive lattices

asked Dec 8, 2014 at 14:01

Stack Exchange Network

1,209 Questions

Maximality without Zorn

Posets as graphs with the direct neighbor relation

"Compactness" theorem for the coloring number

"Gaps" in the Rudin-Keisler ordering

Can infinite bounded distibutive lattices be "arbitrarily wide"?

Refining topologies to make them Hausdorff

Spaces that are invariant under some contractions

Cardinality of a set of pairwise non-order-isomorphic ultrafilters on $\omega$

Infinite $3$-chromatic hypergraphs

Maximality with respect to having no marriage

Greedy coloring for infinite graphs

Interval topology of the poset of all coverings

Intersection number of infinite graphs

$\mathbb{R}$ and the order-convergence topology

Image spaces of $X^2$

Commuting functions and fixpoints

A graph consisting of cliques pairwise intersecting in 1 point

Quasi-disjoint subsets of an infinite set and $\neg \mathsf{AC}$

$\kappa$-impediments (according to Shelah, Nash-Williams, Aharoni)

Antichain on $\mathcal{P}(\omega)/fin$ of cardinality $2^{\aleph_0}$?

Chromatic number of graph defined on the set of permutations

Regular epimorphisms in the category of simple undirected graphs

Linear intersection number and coloring (not chromatic) number

Existence of injective neighborhood selection function as separation axiom

Countable hypo-hamiltonian graph

Strongly minimal covers

Image of poset with Hausdorff interval topology

Constructing a function from preimages

What can be said about graphs if there are homomorphisms in both directions?

Unique representability of bounded distributive lattices