User Sean Eberhard - MathOverflow

28 votes

Function that produces primes

answered Mar 16, 2022 at 18:51

23 votes

morphism from a compact group to Z ?

answered Jan 22, 2015 at 22:20

22 votes

Accepted

A rather curious identity on sums over triple binomial terms

answered Dec 23, 2021 at 17:31

21 votes

Accepted

How does Sage order the elements of the symmetric group?

answered Mar 16, 2023 at 9:49

18 votes

Accepted

A set of positive measure with cardinality less than that of the continuum?

answered Mar 25, 2013 at 14:44

16 votes

Accepted

Are there $2^{\aleph_0}$ pairwise non-isomorphic countable groups containing every finite group?

answered Nov 16, 2023 at 13:25

13 votes

Accepted

Speed of convergence of $\zeta(2k)\to 1$?

answered Dec 15, 2021 at 21:19

12 votes

Accepted

How quasirandom are the nonabelian finite simple groups?

answered Dec 2, 2021 at 12:03

12 votes

Accepted

Maximal Number of Pairs of Orthogonal vectors in a set of $n$ vectors in $\mathbb{R}^3$

answered Aug 13, 2015 at 12:37

11 votes

Accepted

A sumset inequality

answered Mar 14, 2014 at 10:54

11 votes

Conjugacy classes in towers of groups

answered Oct 2, 2023 at 12:52

10 votes

Accepted

A Hölder like inequality

answered Mar 10, 2012 at 22:23

10 votes

Accepted

A question about expander graphs

answered Mar 14, 2012 at 15:06

10 votes

Functions $f$ on $\mathbb{Z}/N\mathbb{Z}$ with $|f|$ and $|\widehat{f}|$ constant

answered Sep 19, 2014 at 12:44

10 votes

What is the smallest cardinality of a self-linked set in a finite cyclic group?

answered Mar 5, 2017 at 10:20

10 votes

How many non-isomorphic abelian subgroups of the permutation group $S_n$?

answered Dec 2, 2021 at 11:29

10 votes

Elementary inhomogeneous inequality for three non-negative reals

answered Oct 27, 2020 at 17:55

10 votes

Probability of commutation in a compact group

answered Oct 12, 2018 at 18:06

9 votes

Accepted

Prescribing the dimension of intersections of sub-vector spaces

answered Jun 24, 2018 at 22:27

9 votes

Accepted

Generic set that is a proper subgroup

answered Apr 6, 2016 at 10:16

9 votes

Covering a set with geometric progressions

answered Jul 1, 2014 at 23:57

9 votes

Maximal subgroups of $S_{\Bbb N}$ and $A_{\Bbb N}$

answered Jul 24, 2023 at 13:33

9 votes

Nonisomorphic finite groups with isomorphic Sylow subgroups

answered May 8, 2023 at 8:49

9 votes

Accepted

Shortest almost trivial element of free group

answered Feb 14 at 12:16

9 votes

Accepted

Maximum density of sum-free sets with respect to Knuth's "addition"

answered 2 days ago

8 votes

Accepted

Order of abelian subgroup of the automorphism group of an abelian group

answered Mar 13 at 14:28

8 votes

Why do these finite group Dedekind matrices seem to have integer spectrum when specialized to the order of group elements?

answered Aug 17 at 14:50

8 votes

Accepted

Finite conjugacy classes

answered Aug 8, 2023 at 17:43

8 votes

Stone-Weierstrass without the "subalgebra" condition

answered May 5, 2023 at 13:59

8 votes

Subgroup property stronger than being characteristic

answered Jul 2, 2014 at 23:02

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100 Answers

Function that produces primes

morphism from a compact group to Z ?

A rather curious identity on sums over triple binomial terms

How does Sage order the elements of the symmetric group?

A set of positive measure with cardinality less than that of the continuum?

Are there $2^{\aleph_0}$ pairwise non-isomorphic countable groups containing every finite group?

Speed of convergence of $\zeta(2k)\to 1$?

How quasirandom are the nonabelian finite simple groups?

Maximal Number of Pairs of Orthogonal vectors in a set of $n$ vectors in $\mathbb{R}^3$

A sumset inequality

Conjugacy classes in towers of groups

A Hölder like inequality

A question about expander graphs

Functions $f$ on $\mathbb{Z}/N\mathbb{Z}$ with $|f|$ and $|\widehat{f}|$ constant

What is the smallest cardinality of a self-linked set in a finite cyclic group?

How many non-isomorphic abelian subgroups of the permutation group $S_n$?

Elementary inhomogeneous inequality for three non-negative reals

Probability of commutation in a compact group

Prescribing the dimension of intersections of sub-vector spaces

Generic set that is a proper subgroup

Covering a set with geometric progressions

Maximal subgroups of $S_{\Bbb N}$ and $A_{\Bbb N}$

Nonisomorphic finite groups with isomorphic Sylow subgroups

Shortest almost trivial element of free group

Maximum density of sum-free sets with respect to Knuth's "addition"

Order of abelian subgroup of the automorphism group of an abelian group

Why do these finite group Dedekind matrices seem to have integer spectrum when specialized to the order of group elements?

Finite conjugacy classes

Stone-Weierstrass without the "subalgebra" condition

Subgroup property stronger than being characteristic