Martin M. W.

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Name	Martin M. W.
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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

30

60

votes

11

answers

8k

views

Is it possible to capture a sphere in a knot?

dg.differential-geometry mg.metric-geometry

feb 20 11 at 18:23 Anton Petrunin 16.5k●41●110

17

33

votes

12

answers

1k

views

Can a discrete set of the plane of uniform density intersect all large triangles?

geometry open-problem mg.metric-geometry discrete-geometry

aug 27 10 at 8:33 ed-wynn 491●5●5

12

25

votes

6

answers

2k

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When shorter means smaller?

mg.metric-geometry discrete-geometry open-problem

sep 12 10 at 16:44 Anton Petrunin 16.5k●41●110

12

22

votes

7

answers

2k

views

When is a monic integer polynomial the characteristic polynomial of a non-negative integer matrix?

linear-algebra polynomials positivity

apr 3 11 at 23:35 Qiaochu Yuan 38.4k●5●116●303

4

15

votes

3

answers

1k

views

Minimal surface in a ball

dg.differential-geometry geometry open-problem

oct 23 11 at 16:39 Anton Petrunin 16.5k●41●110