List questions from group-schemes

Published on 05 Jun 2015 - 2:33

224

Views

Non-computational proof that $\det(A)$ is a unit in $R$ implies $A$ is a unit, for $A \in M_n(R)$.

Published on 09 Jun 2015 - 1:51

176

Views

Is the constant group scheme for $\mathbb{Z}$ affine?

Published on 28 Jul 2015 - 17:07

80

Views

Rational points of an open subset of a group scheme

Published on 29 Sep 2015 - 14:07

65

Views

Tannakian category

Published on 21 Mar 2026 - 22:49

76

Views

A closed subfunctor $ Z $ of $ Y $ and the fibred product $ Z \times_{Y} h^A $.

Published on 21 Oct 2015 - 20:02

89

Views

$E[n]$ is etale locally $(\mathbb{Z}/n\mathbb{Z})^2$

Published on 17 Dec 2015 - 18:16

145

Views

Milne's definition of $G$-torsors

Published on 21 Mar 2026 - 21:55

115

Views

Classification of group schemes of order 2: Why is $sx=x\otimes 1+1\otimes x-cx\otimes x$?

Published on 12 Mar 2026 - 15:34

68

Views

Naive question about quotient by a finite group scheme

Published on 14 Mar 2026 - 10:13

155

Views

About normalizer subgroup scheme

Published on 09 Jan 2016 - 19:02

174

Views

How does Hartshorne's definition of group schemes encode the law for the neutral element?

Published on 21 Mar 2026 - 21:50

132

Views

open subgroup scheme closed

Published on 24 Feb 2016 - 15:34

150

Views

Extensions of P-divisible Groups

Published on 23 Mar 2026 - 10:08

95

Views

If $H$ is a closed subgroup of $G$, is the Lie algebra of $H$ contained in the Lie algebra of $G$?

Published on 25 Mar 2016 - 18:43

List Question

Equivalence of line bundles and $\mathbb{G}_m$-torsors

Non-computational proof that $\det(A)$ is a unit in $R$ implies $A$ is a unit, for $A \in M_n(R)$.

Is the constant group scheme for $\mathbb{Z}$ affine?

Rational points of an open subset of a group scheme

Tannakian category

A closed subfunctor $ Z $ of $ Y $ and the fibred product $ Z \times_{Y} h^A $.

$E[n]$ is etale locally $(\mathbb{Z}/n\mathbb{Z})^2$

Milne's definition of $G$-torsors

Classification of group schemes of order 2: Why is $sx=x\otimes 1+1\otimes x-cx\otimes x$?

Naive question about quotient by a finite group scheme

About normalizer subgroup scheme

How does Hartshorne's definition of group schemes encode the law for the neutral element?

open subgroup scheme closed

Extensions of P-divisible Groups

If $H$ is a closed subgroup of $G$, is the Lie algebra of $H$ contained in the Lie algebra of $G$?

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