User Yoav Kallus

47 votes

Accepted

"The Two Sheriffs" puzzle

answered Apr 18, 2015 at 17:54

41 votes

What recent discoveries have amateur mathematicians made?

answered May 12, 2012 at 19:51

33 votes

Accepted

Bodies of constant width?

answered Jan 26, 2012 at 19:28

26 votes

Covering a Cube with a Square

answered May 3, 2012 at 21:10

23 votes

What are some mathematical sculptures?

answered Feb 7, 2014 at 17:20

18 votes

Accepted

Closest 3D rotation matrix in the Frobenius norm sense

answered Jan 24, 2012 at 16:18

17 votes

Examples of conjectures that were widely believed to be true but later proved false

answered May 3, 2012 at 21:42

16 votes

Accepted

(A question about)${}^3$ 3-dimensional convex bodies

answered Aug 4, 2013 at 16:05

16 votes

Two (probably) equal real numbers which are not proved to be equal?

answered May 8, 2019 at 13:12

14 votes

Open problems in mathematical physics

answered Jul 9, 2017 at 14:34

14 votes

Distributing points evenly on a sphere

answered Jul 29, 2015 at 16:32

13 votes

Accepted

General Isoperimetric Inequality via Representation Theory of SO(n)

answered Jan 26, 2012 at 22:09

13 votes

Nontrivially fillable gaps in published proofs of major theorems

answered Feb 18, 2020 at 16:29

12 votes

Important open problems that have already been reduced to a finite but infeasible amount of computation

answered Nov 13, 2012 at 20:17

11 votes

A convex curve inside the unit circle

answered Jul 4, 2013 at 22:29

11 votes

The smallest disk containing all sides of an $n$-gon

answered Nov 3, 2015 at 18:22

11 votes

Accepted

Are the primary parallelotopes classified? (equivalently, Voronoi cells of lattices)

answered Nov 10, 2015 at 5:21

11 votes

Accepted

2-layer tilings with a center-of-gravity constraint

answered Aug 23, 2013 at 15:09

10 votes

Accepted

Tangled Knot Function

answered Apr 29, 2012 at 3:26

10 votes

A function that is defined everywhere but has unknown values

answered Sep 14, 2012 at 13:16

10 votes

Undecidable infinite analogs of NP-complete problems?

answered Oct 1, 2021 at 23:59

9 votes

Undecidable puzzles

answered Aug 4, 2014 at 19:18

7 votes

Accepted

metric condition forcing convex position

answered Nov 19, 2015 at 18:28

7 votes

There are at most four mutually visible lattice points—?

answered Jan 27, 2021 at 22:09

7 votes

How many unit cylinders can touch a unit ball?

answered Jun 3, 2018 at 0:33

6 votes

Special rational numbers that appear as answers to natural questions

answered Aug 22, 2017 at 20:10

6 votes

Accepted

Can samples be compressed?

answered May 10, 2016 at 20:10

6 votes

Accepted

Package for the Closest Vector Problem (CVP)?

answered Dec 1, 2016 at 22:45

6 votes

Accepted

On packing axisymmetric bodies in 3D

answered Jul 24, 2021 at 0:17

6 votes

Nearest symmetric matrix, of a given spectrum, to a given diagonal matrix

answered Aug 31, 2022 at 13:13

Stack Exchange Network

95 Answers

"The Two Sheriffs" puzzle

What recent discoveries have amateur mathematicians made?

Bodies of constant width?

Covering a Cube with a Square

What are some mathematical sculptures?

Closest 3D rotation matrix in the Frobenius norm sense

Examples of conjectures that were widely believed to be true but later proved false

(A question about)${}^3$ 3-dimensional convex bodies

Two (probably) equal real numbers which are not proved to be equal?

Open problems in mathematical physics

Distributing points evenly on a sphere

General Isoperimetric Inequality via Representation Theory of SO(n)

Nontrivially fillable gaps in published proofs of major theorems

Important open problems that have already been reduced to a finite but infeasible amount of computation

A convex curve inside the unit circle

The smallest disk containing all sides of an $n$-gon

Are the primary parallelotopes classified? (equivalently, Voronoi cells of lattices)

2-layer tilings with a center-of-gravity constraint

Tangled Knot Function

A function that is defined everywhere but has unknown values

Undecidable infinite analogs of NP-complete problems?

Undecidable puzzles

metric condition forcing convex position

There are at most four mutually visible lattice points—?

How many unit cylinders can touch a unit ball?

Special rational numbers that appear as answers to natural questions

Can samples be compressed?

Package for the Closest Vector Problem (CVP)?

On packing axisymmetric bodies in 3D

Nearest symmetric matrix, of a given spectrum, to a given diagonal matrix