User Bjørn Kjos-Hanssen

20 votes

4 answers

2k views

Cayley graph of $A_5$ with generators $(1,2,3,4,5),(1,4,3,2,5)$

asked Jul 3, 2018 at 1:36

19 votes

1 answer

671 views

Models of ZFC and the Borel hierarchy

asked Apr 8, 2017 at 7:29

18 votes

4 answers

2k views

Complete Boolean algebra not isomorphic to a $\sigma$-algebra

asked Feb 21, 2014 at 17:51

17 votes

2 answers

1k views

Homeomorphisms and "mod finite"

asked Jul 4, 2020 at 6:00

14 votes

1 answer

424 views

Unpublished result of Rosser in Sieve Methods book

asked Feb 16, 2022 at 0:05

13 votes

1 answer

654 views

Is the nearest walk to Brownian motion uniform?

asked Sep 12, 2010 at 6:20

12 votes

1 answer

694 views

History of the Jaccard distance $d(A,B) = \mathbb P(\overline A\cup\overline B\mid A\cup B)$

asked Jan 6, 2015 at 2:06

11 votes

1 answer

328 views

Unique words in dihedral groups

asked Aug 14, 2017 at 3:04

10 votes

4 answers

2k views

Axiom of Infinity needed in Cantor-Bernstein?

asked Mar 13, 2010 at 7:35

10 votes

6 answers

2k views

Math research in the app store [closed]

asked Jun 29, 2013 at 8:26

10 votes

2 answers

1k views

$\aleph$ looks like $\mathbb N$?

asked Apr 8, 2014 at 21:50

9 votes

0 answers

2k views

Weighted Hamming distance

asked Sep 9, 2010 at 19:43

9 votes

2 answers

383 views

A cubefree-preserving morphism from 5 to 2?

asked Apr 20, 2020 at 7:48

9 votes

1 answer

398 views

VC dimension of Borel sets [duplicate]

asked Sep 14, 2021 at 2:58

8 votes

1 answer

253 views

Automorphisms of power set lattice mod finite

asked Apr 12, 2018 at 18:58

8 votes

1 answer

483 views

VC dimension of standard topology on the reals

asked Sep 13, 2021 at 21:03

8 votes

1 answer

255 views

Characterizing surface area

asked Apr 11, 2016 at 19:43

7 votes

1 answer

444 views

Which monoids have a faithful irreducible representation?

asked Sep 25, 2022 at 21:54

6 votes

1 answer

287 views

Group action with unique word

asked Sep 27, 2020 at 5:18

6 votes

5 answers

1k views

Fractals of dimension zero

asked Oct 23, 2016 at 19:28

6 votes

0 answers

203 views

Elementary function relative to erf

asked Apr 6, 2015 at 18:59

6 votes

1 answer

303 views

A group, neither amenable, nor having a subgroup that looks like $F_2$ up to level $n$?

asked Nov 7, 2017 at 1:41

6 votes

1 answer

416 views

An eventually different function adding no Solovay real nor dominating function?

asked Oct 7, 2010 at 19:42

6 votes

1 answer

352 views

Number of partitions whose blocks form arithmetic progressions

asked Feb 17, 2014 at 8:23

5 votes

2 answers

273 views

Smooth convex extensibility of combination of two line segments

asked Apr 7, 2014 at 18:37

5 votes

1 answer

577 views

Quantum probability experiment?

asked Oct 26, 2010 at 5:06

5 votes

0 answers

308 views

Is the nearest walk to Brownian motion approximately uniform?

asked Sep 12, 2010 at 15:53

5 votes

0 answers

149 views

Linear diophantine quasivariety having a unique solution

asked Sep 4, 2018 at 4:42

4 votes

1 answer

301 views

Strings with no long runs from proper subalphabets

asked May 15, 2015 at 23:29

4 votes

0 answers

224 views

Equations in finite subgroups of unitary groups

asked Nov 25, 2016 at 0:22

Stack Exchange Network

48 Questions

Cayley graph of $A_5$ with generators $(1,2,3,4,5),(1,4,3,2,5)$

Models of ZFC and the Borel hierarchy

Complete Boolean algebra not isomorphic to a $\sigma$-algebra

Homeomorphisms and "mod finite"

Unpublished result of Rosser in Sieve Methods book

Is the nearest walk to Brownian motion uniform?

History of the Jaccard distance $d(A,B) = \mathbb P(\overline A\cup\overline B\mid A\cup B)$

Unique words in dihedral groups

Axiom of Infinity needed in Cantor-Bernstein?

Math research in the app store [closed]

$\aleph$ looks like $\mathbb N$?

Weighted Hamming distance

A cubefree-preserving morphism from 5 to 2?

VC dimension of Borel sets [duplicate]

Automorphisms of power set lattice mod finite

VC dimension of standard topology on the reals

Characterizing surface area

Which monoids have a faithful irreducible representation?

Group action with unique word

Fractals of dimension zero

Elementary function relative to erf

A group, neither amenable, nor having a subgroup that looks like $F_2$ up to level $n$?

An eventually different function adding no Solovay real nor dominating function?

Number of partitions whose blocks form arithmetic progressions

Smooth convex extensibility of combination of two line segments

Quantum probability experiment?

Is the nearest walk to Brownian motion approximately uniform?

Linear diophantine quasivariety having a unique solution

Strings with no long runs from proper subalphabets

Equations in finite subgroups of unitary groups