User Tom De Medts

2 votes

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Actions of $Z_n$ and actions of $Z_{n-1}$

answered Apr 20, 2011 at 11:59

2 votes

Orthogonal transformations fixing a subspace (setwise)

answered Jun 8, 2011 at 7:56

2 votes

Quadratic forms question

answered Oct 25, 2011 at 7:45

2 votes

polarization/linearization as in jordan forms

answered Jan 9, 2012 at 13:27

2 votes

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Let G be an affine connected algebraic group. When a subvariety of G with codimension one is a subgroup.

answered Apr 3, 2012 at 9:46

2 votes

Accepted

Using permutation matrix to convert a matrix into tridiagonal matrix

answered Dec 6, 2019 at 10:44

2 votes

P-group with abelian centralzer

answered Mar 29, 2013 at 10:00

2 votes

Tits-Kantor-Koecher construction for Jordan algebra of symmetric bilinear form

answered Mar 31, 2015 at 12:35

2 votes

Algebraic Groups, Modules, and Comodules

answered Jun 10, 2014 at 15:17

2 votes

Proof involving retractions onto apartments

answered Sep 18, 2023 at 10:47

1 vote

The most unexpected and/or the least natural category theory theorem?

answered Mar 19, 2014 at 13:13

1 vote

Jordan algebra and quaternionic projective space

answered May 16, 2012 at 12:18

1 vote

Accepted

Double coset isomorphism

answered May 30, 2012 at 13:21

1 vote

Accepted

Non-trivial alternating sums of binomial coefficients

answered Dec 16, 2019 at 7:58

1 vote

Generators of the orthogonal group of a quadratic form in odd dimension in characteristic 2

answered Mar 25, 2021 at 10:05

1 vote

Twisted root subgroups in twisted Chevalley groups (reference request)

answered Jan 28, 2022 at 11:16

1 vote

affine and projective schemes over $\mathbf{F}_1$?

answered May 9, 2012 at 12:27

1 vote

Accepted

A problem in Finite Group Theory

answered Feb 17, 2011 at 16:26

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78 Answers

Actions of $Z_n$ and actions of $Z_{n-1}$

Orthogonal transformations fixing a subspace (setwise)

Quadratic forms question

polarization/linearization as in jordan forms

Let G be an affine connected algebraic group. When a subvariety of G with codimension one is a subgroup.

Using permutation matrix to convert a matrix into tridiagonal matrix

P-group with abelian centralzer

Tits-Kantor-Koecher construction for Jordan algebra of symmetric bilinear form

Algebraic Groups, Modules, and Comodules

Proof involving retractions onto apartments

The most unexpected and/or the least natural category theory theorem?

Jordan algebra and quaternionic projective space

Double coset isomorphism

Non-trivial alternating sums of binomial coefficients

Generators of the orthogonal group of a quadratic form in odd dimension in characteristic 2

Twisted root subgroups in twisted Chevalley groups (reference request)

affine and projective schemes over $\mathbf{F}_1$?

A problem in Finite Group Theory