User Mikhail Borovoi

5 votes

2 answers

561 views

Diagonalizable subgroups in a simply connected group

asked Apr 7, 2011 at 14:53

5 votes

5 answers

1k views

Connected groupoids and action groupoids

asked Apr 16, 2013 at 18:17

5 votes

1 answer

453 views

A subgroup of the Weyl group

asked Aug 23, 2013 at 11:28

5 votes

2 answers

344 views

Non-commuting elements of finite orders in a reductive group over a p-adic field

asked Oct 15 at 12:06

5 votes

1 answer

199 views

Coordinate-free description of an alternating trilinear form on pure octonions

asked Nov 30, 2020 at 15:07

5 votes

1 answer

281 views

What is the meaning of this coboundary homomorphism for group hypercohomology?

asked Jan 10, 2021 at 17:35

4 votes

1 answer

437 views

Connectedness of the stabilizer in a semisimple group of a semisimple element in the Lie algebra: a reference request

asked Mar 27, 2020 at 16:13

4 votes

1 answer

424 views

Symmetric subgroups of simple algebraic groups over finite fields

asked Nov 29, 2018 at 7:35

4 votes

0 answers

200 views

Non-trivial example of a variety with an action of a unipotent group?

asked Nov 11, 2022 at 18:02

4 votes

0 answers

161 views

Algorithm for generalized Hilbert's Theorem 90 over $\Bbb R$

asked Dec 3, 2022 at 13:48

4 votes

0 answers

120 views

Neutral cohomology classes and restriction maps for $H^2$ in group cohomology

asked Mar 24, 2021 at 14:05

4 votes

1 answer

457 views

Is a complex or real algebraic variety homotopically equivalent to a CW complex?

asked Apr 25, 2021 at 15:11

4 votes

0 answers

147 views

A normal extension of a number field of given degree that does not split over a given set of finite places

asked Nov 24, 2023 at 16:12

4 votes

0 answers

63 views

Possible questions about the Tate-Shafarevich subgroup of a Galois hypercohomology group?

asked Sep 9, 2023 at 14:57

4 votes

0 answers

113 views

Duality for finite quotient groups of finitely generated free abelian groups

asked Feb 6, 2023 at 13:39

4 votes

2 answers

296 views

Biquadratic extension of global function fields with cyclic decomposition groups

asked Apr 21, 2023 at 13:48

4 votes

1 answer

172 views

A small rank linear combination of a small number of elements of a group

asked Dec 29, 2014 at 12:21

4 votes

1 answer

333 views

Orbits in the adjoint representation of $SU(2,1)$

asked Oct 10, 2015 at 15:34

4 votes

0 answers

76 views

Minimal rank of a permutation resolution of a $G$-lattice

asked Jun 2, 2015 at 5:09

4 votes

1 answer

214 views

A quotient group of a self-normalizing spherical subgroup

asked Jul 16, 2016 at 9:22

4 votes

2 answers

729 views

Reference request: the comparison theorem for the étale fundamental group

asked Feb 14, 2017 at 13:29

4 votes

0 answers

640 views

Closed subgroups of a connected Lie group

asked Feb 14, 2017 at 14:52

4 votes

1 answer

218 views

Action of $N(H)/H$ on the colors of a spherical homogeneous space $G/H$

asked Jun 9, 2017 at 12:01

3 votes

1 answer

226 views

Real automorphisms of the "quaternionic" real group ${\rm SO}^*(4m)$

asked May 11, 2018 at 10:05

3 votes

1 answer

168 views

Is any spherical subgroup conjugate to a subgroup defined over a smaller algebraically closed field?

asked Jul 31, 2017 at 15:56

3 votes

0 answers

204 views

A criterion for a $G$-variety to be isomorphic to $G/H$

asked Aug 6, 2017 at 12:08

3 votes

1 answer

322 views

The group of $G$-automorphisms of a spherical variety from the spherical datum?

asked Sep 21, 2016 at 19:44

3 votes

0 answers

102 views

Localized at $p$ integral representations of finite elementary $p$-groups

asked May 20, 2015 at 18:57

3 votes

0 answers

87 views

Connected components of a certain real homogeneous space

asked Aug 4, 2015 at 12:51

3 votes

0 answers

120 views

Synonyms for "labeling" of a graph

asked Sep 26, 2015 at 9:09

Stack Exchange Network

142 Questions

Diagonalizable subgroups in a simply connected group

Connected groupoids and action groupoids

A subgroup of the Weyl group

Non-commuting elements of finite orders in a reductive group over a p-adic field

Coordinate-free description of an alternating trilinear form on pure octonions

What is the meaning of this coboundary homomorphism for group hypercohomology?

Connectedness of the stabilizer in a semisimple group of a semisimple element in the Lie algebra: a reference request

Symmetric subgroups of simple algebraic groups over finite fields

Non-trivial example of a variety with an action of a unipotent group?

Algorithm for generalized Hilbert's Theorem 90 over $\Bbb R$

Neutral cohomology classes and restriction maps for $H^2$ in group cohomology

Is a complex or real algebraic variety homotopically equivalent to a CW complex?

A normal extension of a number field of given degree that does not split over a given set of finite places

Possible questions about the Tate-Shafarevich subgroup of a Galois hypercohomology group?

Duality for finite quotient groups of finitely generated free abelian groups

Biquadratic extension of global function fields with cyclic decomposition groups

A small rank linear combination of a small number of elements of a group

Orbits in the adjoint representation of $SU(2,1)$

Minimal rank of a permutation resolution of a $G$-lattice

A quotient group of a self-normalizing spherical subgroup

Reference request: the comparison theorem for the étale fundamental group

Closed subgroups of a connected Lie group

Action of $N(H)/H$ on the colors of a spherical homogeneous space $G/H$

Real automorphisms of the "quaternionic" real group ${\rm SO}^*(4m)$

Is any spherical subgroup conjugate to a subgroup defined over a smaller algebraically closed field?

A criterion for a $G$-variety to be isomorphic to $G/H$

The group of $G$-automorphisms of a spherical variety from the spherical datum?

Localized at $p$ integral representations of finite elementary $p$-groups

Connected components of a certain real homogeneous space

Synonyms for "labeling" of a graph