User DavidLHarden

34 votes

Accepted

Groups that do not exist

answered Dec 8, 2012 at 20:49

21 votes

Accepted

Can the unsolvability of quintics be seen in the geometry of the icosahedron?

answered Jun 10, 2013 at 20:32

14 votes

Why is the Gamma function shifted from the factorial by 1?

answered Mar 19, 2011 at 23:26

11 votes

Being a subgroup: proof by character theory

answered Nov 5, 2011 at 21:27

8 votes

Character-free proof that Frobenius kernel is a normal subgroup?

answered Apr 28, 2011 at 20:38

7 votes

Are there any solutions to $2^n-3^m=1$?

answered Jul 1, 2011 at 22:34

7 votes

finite groups of SL(4,C)

answered Apr 20, 2012 at 19:43

7 votes

Is there any real quadratic ring for which the Euclidean algorithm is polynomial?

answered Mar 17, 2016 at 17:14

6 votes

Why do Bernoulli numbers arise everywhere?

answered Nov 18, 2014 at 19:30

6 votes

Transitive subgroup of $S_p$ containing a $p$-cycle and a double transposition

answered May 30, 2013 at 10:11

5 votes

Embedding $S_3$ into $Aut(F_2)$

answered May 16, 2011 at 22:00

4 votes

The number of conjugacy classes and the order of the group

answered Oct 26, 2011 at 7:40

4 votes

Applications for p-Sylow subgroups theorem

answered Mar 28, 2012 at 5:20

3 votes

"Mathematics talk" for five year olds

answered Oct 1, 2012 at 22:07

3 votes

Automorphism Group of Paley Graph

answered Jul 25, 2011 at 17:08

3 votes

Transitive permutation groups which all of their proper subgroups are intransitive

answered Apr 15, 2016 at 17:39

3 votes

Can we parametrize the Fermat curve by $g(t)^n+g'(t)^n=1$ for already named $g(t)$?

answered Dec 8, 2016 at 22:38

3 votes

Maximal $k$-transitivity for a proper subgroup of $S_n$

answered Aug 1, 2013 at 21:17

2 votes

Variations to Cayley's Embedding Theorem for Groups

answered Apr 17, 2014 at 23:55

2 votes

Results about the existence of solutions in groups

answered Apr 24, 2014 at 4:15

2 votes

Fantastic properties of Z/2Z

answered Jul 3, 2014 at 2:15

2 votes

Classes of Numbers that are easy to factorize using Classical Computers?

answered Sep 7, 2016 at 22:39

2 votes

Collatz related question

answered Jun 12, 2011 at 22:30

2 votes

Extremal lattices

answered Mar 16, 2011 at 5:20

1 vote

Torus based cryptography

answered Mar 17, 2011 at 22:43

1 vote

Examples where adding complexity made a problem simpler

answered Nov 26, 2012 at 2:26

1 vote

What other lattices are obtainable from this noncommutative ring?

answered Jun 22, 2020 at 13:00

1 vote

Variations to Cayley's Embedding Theorem for Groups

answered Jul 7, 2014 at 13:53

0 votes

Generating a finite group from elements in each conjugacy class

answered Nov 30, 2011 at 8:04

0 votes

The multiplicative order of 2 modulo primes

answered Apr 4, 2011 at 0:26

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30 Answers

Groups that do not exist

Can the unsolvability of quintics be seen in the geometry of the icosahedron?

Why is the Gamma function shifted from the factorial by 1?

Being a subgroup: proof by character theory

Character-free proof that Frobenius kernel is a normal subgroup?

Are there any solutions to $2^n-3^m=1$?

finite groups of SL(4,C)

Is there any real quadratic ring for which the Euclidean algorithm is polynomial?

Why do Bernoulli numbers arise everywhere?

Transitive subgroup of $S_p$ containing a $p$-cycle and a double transposition

Embedding $S_3$ into $Aut(F_2)$

The number of conjugacy classes and the order of the group

Applications for p-Sylow subgroups theorem

"Mathematics talk" for five year olds

Automorphism Group of Paley Graph

Transitive permutation groups which all of their proper subgroups are intransitive

Can we parametrize the Fermat curve by $g(t)^n+g'(t)^n=1$ for already named $g(t)$?

Maximal $k$-transitivity for a proper subgroup of $S_n$

Variations to Cayley's Embedding Theorem for Groups

Results about the existence of solutions in groups

Fantastic properties of Z/2Z

Classes of Numbers that are easy to factorize using Classical Computers?

Collatz related question

Extremal lattices

Torus based cryptography

Examples where adding complexity made a problem simpler

What other lattices are obtainable from this noncommutative ring?

Variations to Cayley's Embedding Theorem for Groups

Generating a finite group from elements in each conjugacy class

The multiplicative order of 2 modulo primes