User Dominic van der Zypen

4 votes

Which topological properties are preserved under taking box products?

answered Jun 19, 2015 at 7:34

4 votes

About the existence of a convergent sequence

answered Jul 4, 2017 at 10:06

4 votes

coloring infinite vertex transitive graph without large cliques

answered Mar 27, 2018 at 8:35

4 votes

Which mathematical definitions should be formalised in Lean?

answered Jun 27, 2019 at 13:22

4 votes

Accepted

Proof of the axiom of choice for finite sets in ZF

answered May 7 at 9:30

3 votes

Prominent non-mathematical work of mathematicians

answered Aug 16, 2021 at 14:46

3 votes

Which topological properties are preserved under taking box products?

answered Jun 22, 2015 at 8:44

3 votes

Knaster Tarski theorem, example needed

answered Jun 2, 2015 at 11:51

3 votes

Class of hypergraphs that are always the neighborhood hypergraph of some simple graph

answered Sep 15, 2015 at 15:32

3 votes

Non-principal prime ideals in infinite distributive lattices

answered Oct 7, 2015 at 13:02

3 votes

Accepted

$T_2$-spaces such that the lattices of open sets can be embedded into each other

answered Aug 5, 2015 at 6:48

3 votes

Does every set $X$ have a topology for which the only continuous self-surjection is the identity map?

answered Aug 18, 2015 at 8:07

3 votes

Accepted

Retractions and left-factoring morphisms

answered Dec 17, 2014 at 10:53

3 votes

Accepted

Average degree of neighbors in a simple graph (-> Friendship paradox)

answered May 6, 2015 at 9:00

2 votes

Accepted

Extending hyperconnected spaces

answered Apr 29, 2015 at 7:33

2 votes

Accepted

Implication between Erdös-Faber-Lovasz conjecture and Hadwiger's conjecture?

answered Apr 13, 2015 at 7:44

2 votes

Accepted

Is $[0,1]^\kappa$ an affine complete lattice?

answered Apr 1, 2015 at 12:25

2 votes

Accepted

Complete sets of incompatible totally ordered down-set in a partially ordered set

answered Feb 27, 2015 at 7:55

2 votes

Product of posets with Hausdorff interval topology

answered Jan 26, 2015 at 8:15

2 votes

Accepted

Tiling relation on the set of partitions

answered Jan 5, 2015 at 15:46

2 votes

scott continuity, sub additivity

answered Oct 16, 2014 at 7:25

2 votes

Accepted

Categorical product of graphs and chromatic number

answered Aug 19, 2015 at 7:32

2 votes

Accepted

Injective subset function

answered Aug 25, 2015 at 8:02

2 votes

Accepted

Does order-preserving equal continuous?

answered Aug 27, 2015 at 7:26

2 votes

Accepted

If $f : [-a,a] \rightarrow \mathbb{IR}$ is Scott continuous, why are $f^-$ and $f^+$ measurable?

answered Jul 24, 2015 at 8:16

2 votes

Class of hypergraphs that are always the neighborhood hypergraph of some simple graph

answered Sep 22, 2015 at 6:49

2 votes

Accepted

Graph with finite chromatic number but infinite total chromatic number

answered Jun 9, 2015 at 8:20

2 votes

Accepted

Set of ideals of the set of finite subsets of $\mathbb{N}$

answered Jun 1, 2015 at 9:20

2 votes

In the category of uniform spaces, is the completion of a quotient map also a quotient map?

answered May 12, 2015 at 14:20

2 votes

Knaster Tarski theorem, example needed

answered Jun 24, 2015 at 8:57

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105 Answers

Which topological properties are preserved under taking box products?

About the existence of a convergent sequence

coloring infinite vertex transitive graph without large cliques

Which mathematical definitions should be formalised in Lean?

Proof of the axiom of choice for finite sets in ZF

Prominent non-mathematical work of mathematicians

Which topological properties are preserved under taking box products?

Knaster Tarski theorem, example needed

Class of hypergraphs that are always the neighborhood hypergraph of some simple graph

Non-principal prime ideals in infinite distributive lattices

$T_2$-spaces such that the lattices of open sets can be embedded into each other

Does every set $X$ have a topology for which the only continuous self-surjection is the identity map?

Retractions and left-factoring morphisms

Average degree of neighbors in a simple graph (-> Friendship paradox)

Extending hyperconnected spaces

Implication between Erdös-Faber-Lovasz conjecture and Hadwiger's conjecture?

Is $[0,1]^\kappa$ an affine complete lattice?

Complete sets of incompatible totally ordered down-set in a partially ordered set

Product of posets with Hausdorff interval topology

Tiling relation on the set of partitions

scott continuity, sub additivity

Categorical product of graphs and chromatic number

Injective subset function

Does order-preserving equal continuous?

If $f : [-a,a] \rightarrow \mathbb{IR}$ is Scott continuous, why are $f^-$ and $f^+$ measurable?

Class of hypergraphs that are always the neighborhood hypergraph of some simple graph

Graph with finite chromatic number but infinite total chromatic number

Set of ideals of the set of finite subsets of $\mathbb{N}$

In the category of uniform spaces, is the completion of a quotient map also a quotient map?

Knaster Tarski theorem, example needed