Will Brian's user avatar
Will Brian's user avatar
Will Brian's user avatar
Will Brian
  • Member for 8 years, 11 months
  • Last seen this week
12 votes
Accepted

Is there a Bernstein subset $X$ of $\mathbb{R}$ such that no continuous map $f : X → [0,1]$ is surjective?

5 votes

Elementary equivalence between $n\mapsto n+1$ and its inverse on the Stone-Čech remainder?

16 votes

Near permutation $n\mapsto n+1$ not conjugate to its inverse on the Stone-Čech remainder?

9 votes

What is the largest large-cardinal hypothesis consistent with $ZFC + V=L$?

2 votes
Accepted

Why is this continuum circle-like?

8 votes
Accepted

Uniformization of almost disjoint families

7 votes

Is every rational sequence topology homeomorphic?

12 votes
Accepted

$\operatorname{cof}(\mathcal{L}) = \aleph_1$ and $2^{\aleph_0} = \aleph_3$

10 votes

Is there always a way up?

27 votes
Accepted

A metric characterization of the real line

16 votes
Accepted

Ultrafilter subtraction and "zero"

13 votes
Accepted

Can the cardinal $2^{\aleph_0}$ be order-embedded in ${\cal P}(\omega)/(\text{fin})$?

5 votes
Accepted

Is it consistent that the additivity of Lebesgue null sets is greater than $\frak h$?

6 votes
Accepted

Cofinal trees in $({}^\omega \omega , \leq^\ast )$

15 votes
Accepted

How “disconnected” can a continuum be?

122 votes

Tweetable Mathematics

5 votes

Strategic vs. tactical closure

11 votes
Accepted

Can we force $\mathfrak{r}<\mathfrak{s}$?

4 votes
Accepted

Searching for cofinal subsets of directed sets subject to finite constraints

4 votes
Accepted

State of the art on: "If a dynamical system is Li-Yorke chaotic, does there exist a Cantor scrambled set?"

3 votes

Configurations of points and circles

3 votes
Accepted

Minimal cardinality of non-bipartite sub-family of $[\omega]^\omega$

11 votes
Accepted

What is an example of a meager space X such that X is concentrated on countable dense set?

8 votes
Accepted

Gaps in cardinalities of MAD families

4 votes
Accepted

Are there such a complete metric space X of weight k (w(X)=k) and ....?

25 votes

Unnecessary uses of the Continuum Hypothesis

13 votes

Example of an uncountable scattered space with some properties

39 votes
Accepted

Are all free ultrafilters 'the same' in some sense?

2 votes

Game versions of the tower number $\mathfrak t$

26 votes

Can you partition the sphere into orthonormal bases?

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