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rpotrie's user avatar
rpotrie's user avatar
rpotrie
  • Member for 12 years, 9 months
  • Last seen more than a month ago
24 votes

Sets with positive Lebesgue measure boundary

23 votes
Accepted

Curvature of a Lie group

13 votes
Accepted

Hausdorff dimension of the boundary of an open set in the Euclidean space - lower bound

12 votes

Why do the homology groups capture holes in a space better than the homotopy groups?

10 votes
Accepted

Is the composition of non-wandering maps still non-wandering?

9 votes

What is the oldest open problem in mathematics?

8 votes
Accepted

Homomorphisms from $\mathbb{R}$ to $\mathrm{Homeo}^+(\mathbb{R})$, or "fractional iterations"

8 votes
Accepted

Do maps have flows?

7 votes

Product Measure Only Possible Measure?

7 votes
Accepted

Are there good product rules on the $k$-sphere?

7 votes

Existence of a vector field with a finite number of limit cycles.

7 votes
Accepted

local behavior of a finite Borel measure

7 votes

Examples of transformations which are weak-mixing but not strong-mixing

6 votes

Diffeomorphisms of the sphere conjugate to a rotation

6 votes

Subspaces of finite codimension in Banach spaces

5 votes
Accepted

The importance of Poincare Conjecture or SPC4?

4 votes

Easy proof of the fact that isotropic spaces are Euclidean

4 votes
Accepted

Measure of the stable set in a dynamical system

4 votes

Random walks and Lyapunov exponents

4 votes

Definition of a strange attractor.

4 votes

The relationship between low dimensional topology and dynamics

4 votes
Accepted

Unstable Foliations

4 votes

A concept of dynamical coherence

4 votes
Accepted

nonwandering set and Birkhoff center

4 votes
Accepted

Locally compact separable metric spaces

4 votes

Is a map a homotopy equivalence if its suspension is so?

4 votes
Accepted

Smoothening pseudo-Anosov flows

4 votes
Accepted

What are the current research directions in the geometric theory of dynamical systems?

4 votes
Accepted

An example of an SRB measure which is not a physical measure

3 votes

Ergodicity of the action of $\operatorname{SL}(n,\mathbb R)$ on $\operatorname{SL}(n,\mathbb R)/\operatorname{SL}(n,\mathbb Z)$