Ivan Meir's user avatar
Ivan Meir's user avatar
Ivan Meir's user avatar
Ivan Meir
  • Member for 13 years, 9 months
  • Last seen this week
  • London
163 votes
46 answers
31k views

Every mathematician has only a few tricks

36 votes
3 answers
6k views

In a topological space if there exists a loop that cannot be contracted to a point does there exist a simple loop that cannot be contracted also?

35 votes
1 answer
2k views

Which polygons can be turned inside out by a smooth deformation?

33 votes
2 answers
2k views

What is the smallest set of real continuous functions generating all rational numbers by iteration?

29 votes
2 answers
5k views

Consequences of eigenvector-eigenvalue formula found by studying neutrinos

23 votes
3 answers
4k views

Continuous functions taking uncountably many values countably often

18 votes
1 answer
1k views

Does a function from $\mathbb R^2$ to $\mathbb R$ which sums to 0 on the corners of any unit square have to vanish everywhere?

17 votes
2 answers
2k views

A proof of Van der Waerden's theorem using a weakened form of Szemeredi's theorem

10 votes
3 answers
839 views

Progress in robustifying mathematics - i.e. making mathematical theorems robust to small changes in hypotheses

10 votes
1 answer
880 views

In a subset of $\mathbb{R}^2$ which is not simply connected does there exist a simple loop that does not contract to a point?

9 votes
2 answers
622 views

Is $\mathbb{Q}$ the orbit of a rational function under iteration?

9 votes
3 answers
1k views

A set with positive upper density whose difference set does not contain an infinite arithmetic progression

7 votes
0 answers
96 views

Rough classification of Peano Curves

6 votes
0 answers
171 views

Plausible ways to discover higher order fourier analysis

5 votes
0 answers
76 views

Maximum size of difference sets with a bounded number of prime divisors

5 votes
1 answer
308 views

Is $\mathbb{Q}$ the orbit of a continuous function that is computable when restricted to $\mathbb{Q}$?

4 votes
0 answers
97 views

Closed curves with minimal total curvature in the unit circle

4 votes
4 answers
279 views

How many residues mod p do you need to take to ensure that you can always find some multiple that contains 3 elements within ϵ of each other

3 votes
1 answer
395 views

In which topological spaces does the existence of a loop not contractible to a point imply there is a non-contractible simple loop also?

3 votes
0 answers
172 views

Ellenberg and Gijswijt's result on arithmetic progressions in subsets of $\mathbb{F}_q^n$ and a generalisation to sets of linear equations

3 votes
1 answer
169 views

Largest subset of quadratic residues with no pair of elements differing by 1

2 votes
0 answers
232 views

Solving $x^k+y^k+z^k=w^k$ non-trivially in strictly positive integers

2 votes
0 answers
72 views

Is there a finite set of polynomials generating all rational numbers by iteration?

2 votes
0 answers
181 views

Is the existence of undecidable propositions decidable?

2 votes
1 answer
146 views

O(1) or o(logn) discrepancy for multiples of an irrational for at least one sub interval

0 votes
1 answer
683 views

Are all manifolds in $\mathbb R^n$ homeomorphic to a smooth manifold?

-4 votes
1 answer
196 views

Is there a procedure to derive models from axiomatic systems? [closed]