Dominic van der Zypen's user avatar
Dominic van der Zypen's user avatar
Dominic van der Zypen's user avatar
Dominic van der Zypen
  • Member for 9 years, 6 months
  • Last seen this week
10 votes
3 answers
251 views

Continuous self-maps on $\mathbb{Q}$

9 votes
3 answers
628 views

Does every homogeneous space allow a group structure?

8 votes
1 answer
1k views

Automorphism group of a topological space

7 votes
1 answer
1k views

Totally disconnected space that is not $T_2$

6 votes
3 answers
290 views

Totally disconnected topologies on countable set.

6 votes
4 answers
636 views

Is $2^{\frak{c}}$ separable?

6 votes
1 answer
387 views

Can every finite group be embedded in $\text{Homeo}(\mathbb{R})$?

5 votes
2 answers
70 views

What does $\text{cl}(\text{im}(e_\mathbb{N}))\subseteq 2^{2^{\mathbb{N}}}$ look like?

5 votes
1 answer
237 views

Surjective measures

5 votes
1 answer
3k views

Commutative rings of characteristic 2

5 votes
1 answer
174 views

Zero-dimensional but not Hausdorff

5 votes
0 answers
91 views

Connected space such that (almost) no subspace is connected [duplicate]

4 votes
1 answer
95 views

Between metacompactness and infinite Lebesgue covering dimension

4 votes
1 answer
108 views

Does "equalisers always closed" imply $T_2$?

4 votes
3 answers
412 views

Totally separated, but the clopen sets do not form a basis

4 votes
1 answer
398 views

Graph with only the identity as endomorphism

4 votes
1 answer
62 views

Universality with respect to quotients

4 votes
1 answer
208 views

3-set-lemma in (naive) set theory

4 votes
1 answer
68 views

Infinite graph $G=(\omega, E)$ with $\delta(G) = \aleph_0$ and no perfect matching

3 votes
0 answers
93 views

Implications of the Principle of continuous induction

3 votes
1 answer
167 views

Embedding $(\mathbb{R},+)$ into $(\text{Sym}(\omega),\circ)$

3 votes
1 answer
1k views

Meets and joins in the lattice of partitions

3 votes
1 answer
431 views

Linear ordering with predecessor and successor

3 votes
2 answers
2k views

Pushout of a subgroup

3 votes
0 answers
62 views

Lower and upper density of iterations of subsets of $\mathbb{N}$

3 votes
3 answers
164 views

Proofs of the form $(P\lor\neg P)\implies Q$

3 votes
2 answers
96 views

Minimal $T_0$-topologies

3 votes
0 answers
55 views

Retracts of $\mathbb{Q}$

3 votes
1 answer
68 views

Discrete subspace of $\mathbb{N}^\mathbb{N}$

3 votes
0 answers
173 views

Infinite connected graph such that every vertex has finite degree