User Sean Eberhard

8 votes

Accepted

"countable" topology

answered Jul 4, 2014 at 10:41

8 votes

Accepted

Subset of $F_2^n$ that must contain some subspace of dimension $k$

answered Jul 12, 2014 at 10:21

8 votes

How abelian can a non-abelian finitely generated group be?

answered Sep 11, 2019 at 7:45

8 votes

Bounds on the number of elements of a given order in a finite simple group

answered Dec 14, 2021 at 10:02

8 votes

When does $G\times G\times G$ admit a faithful group action on a set of size $|G|$?

answered Jan 5, 2022 at 15:04

7 votes

Accepted

Følner sequences of the integers

answered Oct 21, 2022 at 9:21

7 votes

Density version of the Erdős-Graham conjecture

answered Jun 26, 2018 at 12:31

7 votes

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An extension of Morera's Theorem

answered Sep 27, 2013 at 12:58

7 votes

Subsets of free groups contained in $2$-generated subgroups

answered Jul 18, 2023 at 14:34

7 votes

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Quadratic refinements of a bilinear form on finite abelian groups

answered Aug 4, 2023 at 11:34

7 votes

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Majority voting on $\{0,1\}^\mathbb{Z}$

answered Sep 4 at 16:51

6 votes

Accepted

Is there a permutation invariant for graphs?

answered Feb 19, 2022 at 11:45

6 votes

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The growth rate of a commutator set in a non-elementary group

answered Apr 19, 2023 at 10:37

6 votes

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Elements in group extensions which cancel unary terms in the language of groups

answered May 4, 2023 at 20:21

6 votes

Accepted

a question about $\epsilon$ net of a compact metric space.

answered Sep 10, 2012 at 8:29

6 votes

Sequences equidistributed modulo 1

answered May 18, 2013 at 10:27

6 votes

Fixed points of $x\mapsto 2^{2^{2^{2^x}}} \mod p$

answered Jul 6, 2014 at 9:47

6 votes

Accepted

Form a $\mathbb{Z}^d$ lattice cycle from given lengths

answered Mar 13, 2012 at 14:16

6 votes

Does the knowledge of $Z(G)$ and $G/Z(G)$ give the full group?

answered Mar 13, 2012 at 21:18

6 votes

Accepted

What is the probability that two random permutations have the same order?

answered Oct 9, 2018 at 0:12

6 votes

Is there a combinatorial reason for variable-independence of this binomial-coefficient identity?

answered Dec 3, 2020 at 17:53

5 votes

Accepted

Minimal degree of primitive permutation group

answered Mar 25, 2022 at 9:15

5 votes

Accepted

Representations of $\text{SL}_n(q)$ of degree $q^{O(n)}$

answered May 7, 2020 at 12:07

5 votes

Accepted

Partition regular systems: do they have solution in (very dense) set of integers?

answered Dec 2, 2015 at 14:22

5 votes

Accepted

When are elements of a (perfect) semidirect product simple commutators?

answered Mar 28, 2023 at 14:51

5 votes

Accepted

A probability problem in the conjugacy classes of symmetric group

answered Feb 28, 2023 at 10:03

5 votes

Must an isomorphism preserving graph transformation preserve the order of the automorphism group?

answered Jul 2, 2023 at 12:46

5 votes

Groups killed by centralizing one element

answered Aug 7 at 10:36

4 votes

Generalization of a mind-boggling box-opening puzzle

answered Oct 21 at 10:02

4 votes

Accepted

Is the free abstract group residually of rank d > 2?

answered Jan 28, 2015 at 9:33

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100 Answers

"countable" topology

Subset of $F_2^n$ that must contain some subspace of dimension $k$

How abelian can a non-abelian finitely generated group be?

Bounds on the number of elements of a given order in a finite simple group

When does $G\times G\times G$ admit a faithful group action on a set of size $|G|$?

Følner sequences of the integers

Density version of the Erdős-Graham conjecture

An extension of Morera's Theorem

Subsets of free groups contained in $2$-generated subgroups

Quadratic refinements of a bilinear form on finite abelian groups

Majority voting on $\{0,1\}^\mathbb{Z}$

Is there a permutation invariant for graphs?

The growth rate of a commutator set in a non-elementary group

Elements in group extensions which cancel unary terms in the language of groups

a question about $\epsilon$ net of a compact metric space.

Sequences equidistributed modulo 1

Fixed points of $x\mapsto 2^{2^{2^{2^x}}} \mod p$

Form a $\mathbb{Z}^d$ lattice cycle from given lengths

Does the knowledge of $Z(G)$ and $G/Z(G)$ give the full group?

What is the probability that two random permutations have the same order?

Is there a combinatorial reason for variable-independence of this binomial-coefficient identity?

Minimal degree of primitive permutation group

Representations of $\text{SL}_n(q)$ of degree $q^{O(n)}$

Partition regular systems: do they have solution in (very dense) set of integers?

When are elements of a (perfect) semidirect product simple commutators?

A probability problem in the conjugacy classes of symmetric group

Must an isomorphism preserving graph transformation preserve the order of the automorphism group?

Groups killed by centralizing one element

Generalization of a mind-boggling box-opening puzzle

Is the free abstract group residually of rank d > 2?