User Chris H

21 votes

0 answers

473 views

Is there a "direct" proof of the Galois symmetry on centre of group algebra?

asked Feb 1, 2022 at 21:38

14 votes

1 answer

705 views

Is there a concrete description of the nontorsion elements in the homotopy groups of spheres?

asked Aug 27, 2021 at 5:57

14 votes

2 answers

593 views

What is known about the structure of finite groups admitting an automorphism where all elements have "norm" one?

asked Feb 17, 2021 at 3:15

11 votes

1 answer

1k views

Are groups determined by their morphisms from solvable groups?

asked Oct 18, 2021 at 0:12

11 votes

1 answer

218 views

A question about the adjoint of the Adams operations on representation rings

asked Jan 26, 2022 at 7:44

7 votes

0 answers

207 views

Is the derivative the unique operation on points in the plane that preserves convexity?

asked Aug 28, 2021 at 23:33

7 votes

0 answers

161 views

How are symmetric functions related to Koszul duality?

asked Sep 14, 2021 at 13:53

6 votes

1 answer

294 views

What properties of a finite group fibre functor give its endomorphisms a hopf algebra structure?

asked Sep 18, 2019 at 11:41

6 votes

2 answers

644 views

Sprinkling signs in unitary matrices

asked Jul 27, 2023 at 6:20

5 votes

2 answers

424 views

Is the Perron-Frobenius dimension of a G-Set given by its cardinality?

asked Apr 1, 2019 at 11:51

5 votes

1 answer

333 views

Is there a higher categorical structure which models the (higher) conjugation actions of a group acting on itself?

asked May 8, 2021 at 14:31

4 votes

0 answers

134 views

Is a group determined by the number of ways its elements multiply to the identity under some ordering?

asked Jun 17, 2020 at 13:27

4 votes

1 answer

301 views

What extra structure does the group of automorphisms of a torsor carry?

asked Sep 30, 2021 at 23:08

4 votes

0 answers

98 views

Is there a cohomological interpretation of the bilinear form arising from Clifford theory?

asked May 7, 2022 at 21:37

4 votes

0 answers

98 views

When can the trace on cohomology be computed as the Euler characteristic of fixed points?

asked Nov 7, 2022 at 6:11

4 votes

0 answers

72 views

Riemannian manifolds with a unique distance property

asked Jun 7, 2023 at 11:03

4 votes

0 answers

131 views

Weakening of terminal object in a category

asked Aug 28, 2023 at 22:55

3 votes

0 answers

78 views

"Character" theory via dualisable $2$ categories

asked Apr 15, 2021 at 6:37

2 votes

0 answers

87 views

Restricted Erdos-Ko-Rado theorem reference

asked Apr 2, 2019 at 11:36

1 vote

0 answers

59 views

Given an abelian galois map of curves, what are the principal divisors on the source fixed by the galois group?

asked Feb 27, 2020 at 23:14

1 vote

0 answers

97 views

Do you recognise this setup of structure on a poset?

asked May 12, 2020 at 10:18

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21 Questions

Is there a "direct" proof of the Galois symmetry on centre of group algebra?

Is there a concrete description of the nontorsion elements in the homotopy groups of spheres?

What is known about the structure of finite groups admitting an automorphism where all elements have "norm" one?

Are groups determined by their morphisms from solvable groups?

A question about the adjoint of the Adams operations on representation rings

Is the derivative the unique operation on points in the plane that preserves convexity?

How are symmetric functions related to Koszul duality?

What properties of a finite group fibre functor give its endomorphisms a hopf algebra structure?

Sprinkling signs in unitary matrices

Is the Perron-Frobenius dimension of a G-Set given by its cardinality?

Is there a higher categorical structure which models the (higher) conjugation actions of a group acting on itself?

Is a group determined by the number of ways its elements multiply to the identity under some ordering?

What extra structure does the group of automorphisms of a torsor carry?

Is there a cohomological interpretation of the bilinear form arising from Clifford theory?

When can the trace on cohomology be computed as the Euler characteristic of fixed points?

Riemannian manifolds with a unique distance property

Weakening of terminal object in a category

"Character" theory via dualisable $2$ categories

Restricted Erdos-Ko-Rado theorem reference

Given an abelian galois map of curves, what are the principal divisors on the source fixed by the galois group?

Do you recognise this setup of structure on a poset?