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grghxy
  • Member for 7 years, 9 months
  • Last seen more than 7 years ago
27 votes
Accepted

Is there a unique commutative group structure on $\mathbb{G}_m$?

12 votes

Frobenius elements in infinite extensions

11 votes
Accepted

Representations of complex semi-simple algebraic group "defined over $\mathbf{Z}$"?

10 votes

Trivialisation of vector bundles on Stein spaces

9 votes
Accepted

Infinitesimal deformations of the formal group of $\mathbb{G}_m$

9 votes

Field of definition of dominant morphisms

9 votes
Accepted

Three and a half basic questions on the Weil restriction of scalars

8 votes

Purely inseparable field extensions of degree p

7 votes
Accepted

Algebraic proof without using comparison theorem for étale cohomology

7 votes
Accepted

Is every proper regular relative algebraic space curve over a Dedekind domain projective?

7 votes
Accepted

Compact form of symplectic groups defined over the rationals

6 votes

How simple does a $\mathbb{Q}$-simple group remain after base change to $\mathbb{Q}_{\ell}$?

6 votes
Accepted

Deciding whether a non-f.g. non-divisible flat module is projective or not

6 votes
Accepted

Algebraic spaces which are automatically schemes

6 votes
Accepted

Lifting torsors in characteristic $p$ to characteristic zero

5 votes
Accepted

Transitivity of discriminant for flat algebras

5 votes
Accepted

Lie Algebras over DVRs and basechange to the completion

3 votes

Lefschetz Principle for semisimplicity

3 votes
Accepted

Reference requests for complex duals of connected reductive groups

3 votes
Accepted

Permutable (Lie) subgroups

3 votes
Accepted

Is there a complete local analogue of the Artin-Tate lemma?

1 vote

Is any F-stable maximal torus contained in some F-stable Borel subgroup?

0 votes

Isotropic ternary forms