User nfdc23

57 votes

Accepted

Which philosophy for reductive groups?

answered Nov 18, 2015 at 6:51

38 votes

Accepted

what is $\mathrm{Bun}(G)$?

answered Apr 27, 2017 at 15:18

27 votes

Surprisingly short or elegant proofs using Lie theory

answered Apr 5, 2017 at 5:30

23 votes

Accepted

Automorphism group of real orthogonal Lie groups

answered Apr 10, 2016 at 23:57

23 votes

Accepted

Is a one-dimensional compact complex analytic space necessarily projective?

answered Jul 24, 2016 at 15:09

22 votes

congruent number problem

answered Jul 16, 2016 at 23:16

20 votes

Accepted

Is the assignment of a root system to a complex semisimple Lie algebra functorial?

answered Jul 23, 2016 at 3:14

20 votes

Clarifying the connection between 'etale locally' and 'formally locally'

answered Sep 20, 2016 at 12:12

18 votes

Accepted

Algebraic spaces as locally ringed spaces

answered Feb 5, 2016 at 15:34

18 votes

Condition for quasi-splitting of special orthogonal group

answered Aug 30, 2016 at 14:09

17 votes

Semisimple representations of discrete groups

answered Dec 19, 2016 at 16:09

17 votes

Accepted

Irreducible representations of simple complex groups

answered Jan 13, 2017 at 14:37

16 votes

Accepted

When do real analytic functions form a coherent sheaf?

answered Nov 7, 2016 at 3:05

14 votes

Accepted

Etale cohomology with coefficients in $\mathbb{Q}$

answered Feb 11, 2017 at 1:03

14 votes

Accepted

A reductive group has a quasi-split inner form

answered May 16, 2017 at 4:08

14 votes

Accepted

Witt-vector vectors

answered Jan 18, 2016 at 1:07

14 votes

Reduction mod $n$ of symplectic group

answered Feb 8, 2018 at 22:49

13 votes

First Galois cohomology of Weil restriction of $\mathbb{G}_m$

answered Feb 3, 2016 at 2:24

13 votes

Albanese variety over non-perfect fields

answered Jan 31, 2017 at 18:26

12 votes

Reduction mod $p$ map is injective?

answered Nov 12, 2016 at 19:16

12 votes

Accepted

Why is the unipotent radical of a parabolic subgroup unimodular?

answered Dec 30, 2016 at 2:41

12 votes

Accepted

Reinterpreting Galois descent over finite fields

answered Oct 19, 2015 at 2:41

10 votes

Accepted

Lie algebra and base change

answered Oct 12, 2015 at 2:02

10 votes

Accepted

Automorphism of restriction of scalars

answered Nov 30, 2016 at 21:20

10 votes

Reference request: correspondence between central simple algebras and quadratic forms

answered Dec 7, 2016 at 19:46

10 votes

Why are anisotropic tori compact?

answered Feb 25, 2017 at 5:01

10 votes

Accepted

Commutative group algebraic spaces

answered Jan 15, 2018 at 3:25

10 votes

Accepted

Regular functions on a product of varieties

answered Apr 14, 2017 at 13:23

10 votes

Accepted

The Picard group of a semisimple algebraic group in positive characteristic

answered Jul 7, 2017 at 3:27

9 votes

Accepted

Elementary question about Langlands decomposition

answered Feb 15, 2017 at 21:29

Stack Exchange Network

85 Answers

Which philosophy for reductive groups?

what is $\mathrm{Bun}(G)$?

Surprisingly short or elegant proofs using Lie theory

Automorphism group of real orthogonal Lie groups

Is a one-dimensional compact complex analytic space necessarily projective?

congruent number problem

Is the assignment of a root system to a complex semisimple Lie algebra functorial?

Clarifying the connection between 'etale locally' and 'formally locally'

Algebraic spaces as locally ringed spaces

Condition for quasi-splitting of special orthogonal group

Semisimple representations of discrete groups

Irreducible representations of simple complex groups

When do real analytic functions form a coherent sheaf?

Etale cohomology with coefficients in $\mathbb{Q}$

A reductive group has a quasi-split inner form

Witt-vector vectors

Reduction mod $n$ of symplectic group

First Galois cohomology of Weil restriction of $\mathbb{G}_m$

Albanese variety over non-perfect fields

Reduction mod $p$ map is injective?

Why is the unipotent radical of a parabolic subgroup unimodular?

Reinterpreting Galois descent over finite fields

Lie algebra and base change

Automorphism of restriction of scalars

Reference request: correspondence between central simple algebras and quadratic forms

Why are anisotropic tori compact?

Commutative group algebraic spaces

Regular functions on a product of varieties

The Picard group of a semisimple algebraic group in positive characteristic

Elementary question about Langlands decomposition