alvarezpaiva

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Name	alvarezpaiva
Member for	1 year
Seen	3 hours ago
Website	math.univ-lille1.fr/~alvarez
Location	Lille, France
Age	46

I'm interested in anything that has (or could have) a geometric flavor.

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71

125

votes

8

answers

5k

views

Two commuting mappings in the disk

gn.general-topology open-problem

may 14 at 11:22 Daniele Zuddas 808●2●9

41

66

votes

12

answers

4k

views

Why is the fundamental group of a compact Riemann surface not free ?

at.algebraic-topology

feb 15 at 6:18 Georges Elencwajg 24.3k●65●132

21

64

votes

4

answers

2k

views

Light rays bouncing in twisted tubes

mg.metric-geometry geometry ds.dynamical-systems billiards

dec 10 11 at 1:51 Joseph O'Rourke 43.3k●1●49●214

48

62

votes

28

answers

6k

views

New grand projects in contemporary math

soft-question

mar 10 at 23:21 unknown (yahoo) 171●1●10

28

46

votes

6

answers

4k

views

Is there an underlying explanation for the magical powers of the Schwarzian derivative?

dg.differential-geometry ds.dynamical-systems projective-geometry schwarzian-derivative

dec 9 at 20:34 Peter Michor 5,522●10●17

28

40

votes

28

answers

4k

views

What are some examples of ingenious, unexpected constructions?

big-list examples

aug 25 at 22:25 Xarles 193●1●6

14

31

votes

4

answers

1k

views

Total spaces of $TS^2$ and $S^2 \times R^2$ not homeomorphic

vector-bundles characteristic-classes at.algebraic-topology homotopy-theory

apr 1 12 at 22:02 zygund 437●2●7

12

29

votes

3

answers

1k

views

$C^1$ isometric embedding of flat torus into $\mathbb{R}^3$

mg.metric-geometry dg.differential-geometry reference-request

apr 23 12 at 18:56 Joseph O'Rourke 43.3k●1●49●214

8

26

votes

4

answers

4k

views

Do actual Sudoku puzzles have a unique rational solution?

sociology-of-math ho.history-overview co.combinatorics

jun 10 10 at 3:02 David Eppstein 9,233●1●21●41

5

23

votes

1

answer

728

views

High Dimensional Analogs of Polygon Spaces

at.algebraic-topology sg.symplectic-geometry geometry triangulations co.combinatorics

sep 24 at 21:52 Gil Kalai 10.7k●6●80●144

6

22

votes

3

answers

2k

views

Optic fibers after Joseph O’Rourke

ds.dynamical-systems billiards

may 20 12 at 15:45 Anton Petrunin 16.5k●41●110

12

22

votes

5

answers

2k

views

Liouville’s theorem with your bare hands

cv.complex-variables

dec 22 at 0:05 Daniel Litt 8,199●2●25●49

15

21

votes

14

answers

6k

views

What is the Implicit Function Theorem good for?

ca.analysis-and-odes calculus smooth-manifolds

apr 1 12 at 18:59 Liviu Nicolaescu 11.4k●1●20●33

9

19

votes

3

answers

870

views

Generalization of Borsuk-Ulam

at.algebraic-topology

apr 11 11 at 16:54 Michael Renardy 4,771●1●10●17

8

19

votes

5

answers

710

views

Concise model of modern fiat money and its non-conservation

ho.history-overview mathematical-economics

jan 27 at 21:28 Greg Kuperberg 36.3k●2●116●179