User Dominic van der Zypen

47 votes

Generalizations of the four-color theorem

answered Dec 7, 2014 at 14:36

24 votes

What are some ways to stay engaged with the mathematical community from outside academia?

answered Nov 23, 2023 at 12:27

23 votes

Not especially famous, long-open problems which anyone can understand

answered Dec 17, 2014 at 8:59

20 votes

Examples of common false beliefs in mathematics

answered Oct 7, 2017 at 20:12

18 votes

Not especially famous, long-open problems which anyone can understand

answered Dec 17, 2014 at 9:44

17 votes

Examples of common false beliefs in mathematics

answered Oct 16, 2014 at 15:33

15 votes

Undecidable easy arithmetical statement

answered Nov 8, 2017 at 12:38

12 votes

How has "what every mathematician should know" changed?

answered Feb 4, 2016 at 14:10

12 votes

Least collaborative mathematician

answered May 12, 2015 at 6:16

11 votes

Proposals for polymath projects

answered Jan 2, 2016 at 10:54

11 votes

Accepted

Topological conditions forcing continuity

answered Aug 29, 2014 at 11:47

11 votes

Accepted

When is the homomorphism poset between posets a lattice?

answered Dec 10, 2014 at 9:41

11 votes

Examples of eventual counterexamples

answered Apr 16 at 20:33

10 votes

"Strange" proofs of existence theorems

answered Oct 10, 2018 at 14:16

9 votes

Accepted

Continuous relations?

answered Sep 10, 2014 at 11:18

8 votes

What's a great christmas present for someone with a PhD in Mathematics?

answered Dec 13, 2020 at 14:18

8 votes

Does there exist a comprehensive compilation of Erdos's open problems?

answered Sep 1, 2017 at 18:59

8 votes

"Mächtigkeit" versus "Kardinalität"?

answered Aug 16, 2018 at 5:33

7 votes

Accepted

Does hyperconnected imply path-connected

answered Apr 16, 2015 at 10:04

6 votes

Defining a topology in the Power Set

answered Aug 27, 2014 at 9:29

6 votes

Concepts in topology successfully transferred to graph theory and combinatorics with non-trivial applications?

answered Nov 16, 2017 at 8:33

6 votes

Open questions about posets

answered Feb 8, 2019 at 11:44

5 votes

Not especially famous, long-open problems which anyone can understand

answered Sep 14, 2022 at 12:14

5 votes

Accepted

Graph Coloring Proof χ (G) ≤ δ + 1 for k-criticals

answered Mar 31, 2017 at 5:41

5 votes

Maximality statements that cannot be proved using $\mathsf{ZL}$

answered Apr 17, 2015 at 8:57

5 votes

Notation for $\log \log \cdots \log n$?

answered Apr 10, 2015 at 12:32

5 votes

Is every continuous function measurable?

answered Oct 9, 2014 at 8:33

5 votes

How big is the lattice of all functions?

answered Aug 28, 2015 at 7:06

5 votes

Solving algebraic problems with topology

answered Jun 1, 2015 at 9:43

4 votes

Accepted

If $X$ is compact, is $[X]^2$ compact, too?

answered May 28, 2015 at 7:28

Stack Exchange Network

105 Answers

Generalizations of the four-color theorem

What are some ways to stay engaged with the mathematical community from outside academia?

Not especially famous, long-open problems which anyone can understand

Examples of common false beliefs in mathematics

Not especially famous, long-open problems which anyone can understand

Examples of common false beliefs in mathematics

Undecidable easy arithmetical statement

How has "what every mathematician should know" changed?

Least collaborative mathematician

Proposals for polymath projects

Topological conditions forcing continuity

When is the homomorphism poset between posets a lattice?

Examples of eventual counterexamples

"Strange" proofs of existence theorems

Continuous relations?

What's a great christmas present for someone with a PhD in Mathematics?

Does there exist a comprehensive compilation of Erdos's open problems?

"Mächtigkeit" versus "Kardinalität"?

Does hyperconnected imply path-connected

Defining a topology in the Power Set

Concepts in topology successfully transferred to graph theory and combinatorics with non-trivial applications?

Open questions about posets

Not especially famous, long-open problems which anyone can understand

Graph Coloring Proof χ (G) ≤ δ + 1 for k-criticals

Maximality statements that cannot be proved using $\mathsf{ZL}$

Notation for $\log \log \cdots \log n$?

Is every continuous function measurable?

How big is the lattice of all functions?

Solving algebraic problems with topology

If $X$ is compact, is $[X]^2$ compact, too?