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Ramiro de la Vega

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Name	Ramiro de la Vega
Member for	1 year
Seen	16 mins ago
Website	matematicas.uniandes.edu.co
Location	Bogotá, Colombia
Age	39

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122

235

votes

3

answers

17k

views

Polynomial bijection from QxQ to Q?

nt.number-theory open-problem

apr 29 at 16:31 unknown (yahoo) 1

119

152

votes

7

answers

67k

views

Philosophy behind Mochizuki’s work on the ABC conjecture

nt.number-theory ag.algebraic-geometry intuition motivation

may 29 at 11:58 Arxenar 1

71

126

votes

8

answers

5k

views

Two commuting mappings in the disk

gn.general-topology open-problem

may 14 at 11:22 Daniele Zuddas 830●2●9

87

100

votes

74

answers

12k

views

Not especially famous, long-open problems which anyone can understand

big-list open-problem open-problems-list

jun 14 at 14:59 The User 1,264●1●11

51

55

votes

35

answers

9k

views

Theorems with unexpected conclusions [closed]

soft-question big-list

jan 1 12 at 3:18 Andres Caicedo 14.8k●1●43●81

23

43

votes

1

answer

2k

views

A function whose fixed points are the primes

nt.number-theory ds.dynamical-systems open-problem

may 29 at 17:22 MathOverflow♦ 1●2●3

36

37

votes

3

answers

4k

views

Does every non-empty set admit a group structure (in ZF)?

set-theory gr.group-theory lo.logic axiom-of-choice

nov 2 11 at 21:30 Justin Palumbo 2,149●1●7●17

16

35

votes

8

answers

4k

views

What is a continuous path?

gn.general-topology at.algebraic-topology graph-theory

jul 8 at 1:55 Valerio Capraro 3,695●12●26

12

32

votes

3

answers

1k

views

Does Euclidean space have a compact factor?

gn.general-topology gt.geometric-topology

apr 4 at 21:42 Ricardo Andrade 2,594●1●9●18

13

29

votes

3

answers

2k

views

What the heck is the Continuum Hypothesis doing in Weibel’s Homological Algebra?

homological-algebra dimension-theory set-theory homological-dimension commutative-rings

jun 28 11 at 16:56 David White 5,040●1●20●27

11

24

votes

5

answers

1k

views

Does every bipartite graph with 512 edges have an induced subgraph with 256 edges?

co.combinatorics nt.number-theory graph-theory induced-subgraph

nov 15 at 0:23 Gerhard Paseman 764●4●4

4

22

votes

0

answers

557

views

Concerning the various proofs from the axiom of choice that R^3 admits of surprising geometrical decompositions into circles, skew lines and so on: can we prove in any instance that there are no Borel such decompositions? Or that AC is required?

lo.logic set-theory axiom-of-choice mg.metric-geometry descriptive-set-theory

apr 9 12 at 22:48 Joel David Hamkins 76.8k●8●192●355

15

20

votes

1

answer

893

views

Criteria for boundedness of power series

fa.functional-analysis ca.analysis-and-odes

jul 24 10 at 20:58 Andreas Rüdinger 1,566●4●14

8

20

votes

1

answer

492

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Sane bound on number of moves for Maker-Breaker game on $\mathbb R^2$ for $\{0,1,2,3,4\}$

co.combinatorics combinatorial-game-theory combinatorial-geometry

mar 3 at 3:51 Douglas Zare 13.5k●3●36●59

5

17

votes

2

answers

1k

views

morphism from a compact group to Z ?

topological-groups gr.group-theory

nov 16 11 at 17:11 Andreas Thom 13.1k●1●23●65